diff --git a/scripts/collect_companion.py b/scripts/collect_companion.py
index 8118f18..90de65f 100755
--- a/scripts/collect_companion.py
+++ b/scripts/collect_companion.py
@@ -74,16 +74,6 @@ async def collect_companion() -> int:
             else:
                 log.error(f"device_query failed: {err}")
 
-            # get_bat
-            ok, evt_type, payload, err = await run_command(
-                mc, cmd.get_bat(), "get_bat"
-            )
-            if ok:
-                commands_succeeded += 1
-                log.debug(f"get_bat: {payload}")
-            else:
-                log.error(f"get_bat failed: {err}")
-
             # get_time
             ok, evt_type, payload, err = await run_command(
                 mc, cmd.get_time(), "get_time"
diff --git a/src/meshmon/charts.py b/src/meshmon/charts.py
index 2af44cb..1c3abf1 100644
--- a/src/meshmon/charts.py
+++ b/src/meshmon/charts.py
@@ -167,6 +167,7 @@ def load_timeseries_from_db(
     end_time: datetime,
     lookback: timedelta,
     period: str,
+    all_metrics: Optional[dict[str, list[tuple[int, float]]]] = None,
 ) -> TimeSeries:
     """Load time series data from SQLite database.
 
@@ -179,6 +180,7 @@ def load_timeseries_from_db(
         end_time: End of the time range (typically now)
         lookback: How far back to look
         period: Period name for binning config ("day", "week", etc.)
+        all_metrics: Optional pre-fetched metrics dict for this period
 
     Returns:
         TimeSeries with extracted data points
@@ -188,7 +190,8 @@ def load_timeseries_from_db(
     end_ts = int(end_time.timestamp())
 
     # Fetch all metrics for this role/period (returns pivoted dict)
-    all_metrics = get_metrics_for_period(role, start_ts, end_ts)
+    if all_metrics is None:
+        all_metrics = get_metrics_for_period(role, start_ts, end_ts)
 
     # Get data for this specific metric
     metric_data = all_metrics.get(metric, [])
@@ -379,10 +382,22 @@ def render_chart_svg(
 
             # Plot area fill
             area_color = _hex_to_rgba(theme.area)
-            ax.fill_between(timestamps, values, alpha=area_color[3], color=f"#{theme.line}")
+            area = ax.fill_between(
+                timestamps,
+                values,
+                alpha=area_color[3],
+                color=f"#{theme.line}",
+            )
+            area.set_gid("chart-area")
 
             # Plot line
-            ax.plot(timestamps, values, color=f"#{theme.line}", linewidth=2)
+            (line,) = ax.plot(
+                timestamps,
+                values,
+                color=f"#{theme.line}",
+                linewidth=2,
+            )
+            line.set_gid("chart-line")
 
             # Set Y-axis limits and track actual values used
             if y_min is not None and y_max is not None:
@@ -458,7 +473,7 @@ def _inject_data_attributes(
 
     Adds:
     - data-metric, data-period, data-theme, data-x-start, data-x-end, data-y-min, data-y-max to root <svg>
-    - data-points JSON array to the chart path element
+    - data-points JSON array to the root <svg> and chart line path
 
     Args:
         svg: Raw SVG string
@@ -495,22 +510,35 @@ def _inject_data_attributes(
         r'<svg\b',
         f'<svg data-metric="{ts.metric}" data-period="{ts.period}" data-theme="{theme_name}" '
         f'data-x-start="{x_start_ts}" data-x-end="{x_end_ts}" '
-        f'data-y-min="{y_min_val}" data-y-max="{y_max_val}"',
+        f'data-y-min="{y_min_val}" data-y-max="{y_max_val}" '
+        f'data-points="{data_points_attr}"',
         svg,
         count=1
     )
 
     # Add data-points to the main path element (the line, not the fill)
-    # Look for the second path element (first is usually the fill area)
-    path_count = 0
-    def add_data_to_path(match):
-        nonlocal path_count
-        path_count += 1
-        if path_count == 2:  # The line path
-            return f'<path data-points="{data_points_attr}"'
-        return match.group(0)
+    def add_data_to_id(match):
+        return f'<path{match.group(1)} data-points="{data_points_attr}"'
 
-    svg = re.sub(r'<path\b', add_data_to_path, svg)
+    svg, count = re.subn(
+        r'<path([^>]*(?:id|gid)="chart-line"[^>]*)',
+        add_data_to_id,
+        svg,
+        count=1,
+    )
+
+    if count == 0:
+        # Look for the second path element (first is usually the fill area)
+        path_count = 0
+
+        def add_data_to_path(match):
+            nonlocal path_count
+            path_count += 1
+            if path_count == 2:  # The line path
+                return f'<path data-points="{data_points_attr}"'
+            return match.group(0)
+
+        svg = re.sub(r'<path\b', add_data_to_path, svg)
 
     return svg
 
@@ -558,9 +586,16 @@ def render_all_charts(
     for metric in metrics:
         all_stats[metric] = {}
 
-        for period in periods:
-            period_cfg = PERIOD_CONFIG[period]
+    for period in periods:
+        period_cfg = PERIOD_CONFIG[period]
+        x_end = now
+        x_start = now - period_cfg["lookback"]
 
+        start_ts = int(x_start.timestamp())
+        end_ts = int(x_end.timestamp())
+        all_metrics = get_metrics_for_period(role, start_ts, end_ts)
+
+        for metric in metrics:
             # Load time series from database
             ts = load_timeseries_from_db(
                 role=role,
@@ -568,6 +603,7 @@ def render_all_charts(
                 end_time=now,
                 lookback=period_cfg["lookback"],
                 period=period,
+                all_metrics=all_metrics,
             )
 
             # Calculate and store statistics
@@ -579,10 +615,6 @@ def render_all_charts(
             y_min = y_range[0] if y_range else None
             y_max = y_range[1] if y_range else None
 
-            # Calculate X-axis range for full period padding
-            x_end = now
-            x_start = now - period_cfg["lookback"]
-
             # Render chart for each theme
             for theme_name in themes:
                 theme = CHART_THEMES[theme_name]
diff --git a/src/meshmon/html.py b/src/meshmon/html.py
index 5ce461f..ea92a2e 100644
--- a/src/meshmon/html.py
+++ b/src/meshmon/html.py
@@ -588,8 +588,8 @@ def build_page_context(
     last_updated = None
     last_updated_iso = None
     if ts:
-        dt = datetime.fromtimestamp(ts)
-        last_updated = dt.strftime("%b %d, %Y at %H:%M UTC")
+        dt = datetime.fromtimestamp(ts).astimezone()
+        last_updated = dt.strftime("%b %d, %Y at %H:%M %Z")
         last_updated_iso = dt.isoformat()
 
     # Build metrics for sidebar
@@ -845,24 +845,24 @@ def build_monthly_table_data(
             airtime = m.get("airtime", MetricStats())
 
             # Convert mV to V for display
-            bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-            bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-            bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+            bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+            bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+            bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
             rows.append({
                 "is_summary": False,
                 "cells": [
                     {"value": f"{daily.date.day:02d}", "class": None},
-                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                     {"value": _fmt_val_time(bat_v_min, bat.min_time), "class": "muted"},
                     {"value": _fmt_val_time(bat_v_max, bat.max_time), "class": "muted"},
-                    {"value": f"{rssi.mean:.0f}" if rssi.mean else "-", "class": None},
-                    {"value": f"{snr.mean:.1f}" if snr.mean else "-", "class": None},
-                    {"value": f"{noise.mean:.0f}" if noise.mean else "-", "class": None},
-                    {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                    {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
-                    {"value": f"{airtime.total:,}" if airtime.total else "-", "class": None},
+                    {"value": f"{rssi.mean:.0f}" if rssi.mean is not None else "-", "class": None},
+                    {"value": f"{snr.mean:.1f}" if snr.mean is not None else "-", "class": None},
+                    {"value": f"{noise.mean:.0f}" if noise.mean is not None else "-", "class": None},
+                    {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                    {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
+                    {"value": f"{airtime.total:,}" if airtime.total is not None else "-", "class": None},
                 ],
             })
 
@@ -877,24 +877,24 @@ def build_monthly_table_data(
         tx = s.get("nb_sent", MetricStats())
         airtime = s.get("airtime", MetricStats())
 
-        bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-        bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-        bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+        bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+        bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+        bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
         rows.append({
             "is_summary": True,
             "cells": [
                 {"value": "", "class": None},
-                {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                 {"value": _fmt_val_day(bat_v_min, bat.min_time), "class": "muted"},
                 {"value": _fmt_val_day(bat_v_max, bat.max_time), "class": "muted"},
-                {"value": f"{rssi.mean:.0f}" if rssi.mean else "-", "class": None},
-                {"value": f"{snr.mean:.1f}" if snr.mean else "-", "class": None},
-                {"value": f"{noise.mean:.0f}" if noise.mean else "-", "class": None},
-                {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
-                {"value": f"{airtime.total:,}" if airtime.total else "-", "class": None},
+                {"value": f"{rssi.mean:.0f}" if rssi.mean is not None else "-", "class": None},
+                {"value": f"{snr.mean:.1f}" if snr.mean is not None else "-", "class": None},
+                {"value": f"{noise.mean:.0f}" if noise.mean is not None else "-", "class": None},
+                {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
+                {"value": f"{airtime.total:,}" if airtime.total is not None else "-", "class": None},
             ],
         })
 
@@ -928,21 +928,21 @@ def build_monthly_table_data(
             tx = m.get("sent", MetricStats())
 
             # Convert mV to V for display
-            bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-            bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-            bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+            bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+            bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+            bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
             rows.append({
                 "is_summary": False,
                 "cells": [
                     {"value": f"{daily.date.day:02d}", "class": None},
-                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                     {"value": _fmt_val_time(bat_v_min, bat.min_time), "class": "muted"},
                     {"value": _fmt_val_time(bat_v_max, bat.max_time), "class": "muted"},
-                    {"value": f"{contacts.mean:.0f}" if contacts.mean else "-", "class": None},
-                    {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                    {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                    {"value": f"{contacts.mean:.0f}" if contacts.mean is not None else "-", "class": None},
+                    {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                    {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
                 ],
             })
 
@@ -954,21 +954,21 @@ def build_monthly_table_data(
         rx = s.get("recv", MetricStats())
         tx = s.get("sent", MetricStats())
 
-        bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-        bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-        bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+        bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+        bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+        bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
         rows.append({
             "is_summary": True,
             "cells": [
                 {"value": "", "class": None},
-                {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                 {"value": _fmt_val_day(bat_v_min, bat.min_time), "class": "muted"},
                 {"value": _fmt_val_day(bat_v_max, bat.max_time), "class": "muted"},
-                {"value": f"{contacts.mean:.0f}" if contacts.mean else "-", "class": None},
-                {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                {"value": f"{contacts.mean:.0f}" if contacts.mean is not None else "-", "class": None},
+                {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
             ],
         })
 
@@ -1033,23 +1033,23 @@ def build_yearly_table_data(
             tx = s.get("nb_sent", MetricStats())
 
             # Convert mV to V
-            bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-            bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-            bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+            bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+            bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+            bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
             rows.append({
                 "is_summary": False,
                 "cells": [
                     {"value": str(agg.year), "class": None},
                     {"value": f"{monthly.month:02d}", "class": None},
-                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                     {"value": _fmt_val_day(bat_v_max, bat.max_time), "class": "muted"},
                     {"value": _fmt_val_day(bat_v_min, bat.min_time), "class": "muted"},
-                    {"value": f"{rssi.mean:.0f}" if rssi.mean else "-", "class": None},
-                    {"value": f"{snr.mean:.1f}" if snr.mean else "-", "class": None},
-                    {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                    {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                    {"value": f"{rssi.mean:.0f}" if rssi.mean is not None else "-", "class": None},
+                    {"value": f"{snr.mean:.1f}" if snr.mean is not None else "-", "class": None},
+                    {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                    {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
                 ],
             })
 
@@ -1062,23 +1062,23 @@ def build_yearly_table_data(
         rx = s.get("nb_recv", MetricStats())
         tx = s.get("nb_sent", MetricStats())
 
-        bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-        bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-        bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+        bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+        bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+        bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
         rows.append({
             "is_summary": True,
             "cells": [
                 {"value": "", "class": None},
                 {"value": "", "class": None},
-                {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                 {"value": _fmt_val_month(bat_v_max, bat.max_time), "class": "muted"},
                 {"value": _fmt_val_month(bat_v_min, bat.min_time), "class": "muted"},
-                {"value": f"{rssi.mean:.0f}" if rssi.mean else "-", "class": None},
-                {"value": f"{snr.mean:.1f}" if snr.mean else "-", "class": None},
-                {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                {"value": f"{rssi.mean:.0f}" if rssi.mean is not None else "-", "class": None},
+                {"value": f"{snr.mean:.1f}" if snr.mean is not None else "-", "class": None},
+                {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
             ],
         })
 
@@ -1113,22 +1113,22 @@ def build_yearly_table_data(
             tx = s.get("sent", MetricStats())
 
             # Convert mV to V
-            bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-            bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-            bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+            bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+            bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+            bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
             rows.append({
                 "is_summary": False,
                 "cells": [
                     {"value": str(agg.year), "class": None},
                     {"value": f"{monthly.month:02d}", "class": None},
-                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                    {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                    {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                     {"value": _fmt_val_day(bat_v_max, bat.max_time), "class": "muted"},
                     {"value": _fmt_val_day(bat_v_min, bat.min_time), "class": "muted"},
-                    {"value": f"{contacts.mean:.0f}" if contacts.mean else "-", "class": None},
-                    {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                    {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                    {"value": f"{contacts.mean:.0f}" if contacts.mean is not None else "-", "class": None},
+                    {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                    {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
                 ],
             })
 
@@ -1140,22 +1140,22 @@ def build_yearly_table_data(
         rx = s.get("recv", MetricStats())
         tx = s.get("sent", MetricStats())
 
-        bat_v_mean = bat.mean / 1000.0 if bat.mean else None
-        bat_v_min = bat.min_value / 1000.0 if bat.min_value else None
-        bat_v_max = bat.max_value / 1000.0 if bat.max_value else None
+        bat_v_mean = bat.mean / 1000.0 if bat.mean is not None else None
+        bat_v_min = bat.min_value / 1000.0 if bat.min_value is not None else None
+        bat_v_max = bat.max_value / 1000.0 if bat.max_value is not None else None
 
         rows.append({
             "is_summary": True,
             "cells": [
                 {"value": "", "class": None},
                 {"value": "", "class": None},
-                {"value": f"{bat_v_mean:.2f}" if bat_v_mean else "-", "class": None},
-                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean else "-", "class": None},
+                {"value": f"{bat_v_mean:.2f}" if bat_v_mean is not None else "-", "class": None},
+                {"value": f"{bat_pct.mean:.0f}" if bat_pct.mean is not None else "-", "class": None},
                 {"value": _fmt_val_month(bat_v_max, bat.max_time), "class": "muted"},
                 {"value": _fmt_val_month(bat_v_min, bat.min_time), "class": "muted"},
-                {"value": f"{contacts.mean:.0f}" if contacts.mean else "-", "class": None},
-                {"value": f"{rx.total:,}" if rx.total else "-", "class": "highlight"},
-                {"value": f"{tx.total:,}" if tx.total else "-", "class": None},
+                {"value": f"{contacts.mean:.0f}" if contacts.mean is not None else "-", "class": None},
+                {"value": f"{rx.total:,}" if rx.total is not None else "-", "class": "highlight"},
+                {"value": f"{tx.total:,}" if tx.total is not None else "-", "class": None},
             ],
         })
 
diff --git a/src/meshmon/reports.py b/src/meshmon/reports.py
index afc28f7..441e9aa 100644
--- a/src/meshmon/reports.py
+++ b/src/meshmon/reports.py
@@ -17,17 +17,12 @@ import calendar
 import json
 from dataclasses import dataclass, field
 from datetime import date, datetime, timedelta
-from pathlib import Path
 from typing import Any, Optional
 
 from .db import get_connection, get_metrics_for_period, VALID_ROLES
-from .env import get_config
 from .metrics import (
     is_counter_metric,
-    get_chart_metrics,
-    transform_value,
 )
-from . import log
 
 
 def _validate_role(role: str) -> str:
@@ -59,6 +54,32 @@ def get_metrics_for_role(role: str) -> list[str]:
         raise ValueError(f"Unknown role: {role}")
 
 
+REPORT_UNITS_RAW = {
+    "battery_mv": "mV",
+    "bat": "mV",
+    "bat_pct": "%",
+    "uptime": "s",
+    "uptime_secs": "s",
+    "last_rssi": "dBm",
+    "last_snr": "dB",
+    "noise_floor": "dBm",
+    "tx_queue_len": "count",
+    "contacts": "count",
+    "recv": "packets",
+    "sent": "packets",
+    "nb_recv": "packets",
+    "nb_sent": "packets",
+    "airtime": "s",
+    "rx_airtime": "s",
+    "flood_dups": "packets",
+    "direct_dups": "packets",
+    "sent_flood": "packets",
+    "recv_flood": "packets",
+    "sent_direct": "packets",
+    "recv_direct": "packets",
+}
+
+
 @dataclass
 class MetricStats:
     """Statistics for a single metric over a period.
@@ -1116,10 +1137,14 @@ def format_yearly_txt(
         return format_yearly_txt_companion(agg, node_name, location)
 
 
-def _metric_stats_to_dict(stats: MetricStats) -> dict[str, Any]:
+def _metric_stats_to_dict(stats: MetricStats, metric: str) -> dict[str, Any]:
     """Convert MetricStats to JSON-serializable dict."""
     result: dict[str, Any] = {"count": stats.count}
 
+    unit = REPORT_UNITS_RAW.get(metric)
+    if unit:
+        result["unit"] = unit
+
     if stats.mean is not None:
         result["mean"] = round(stats.mean, 4)
     if stats.min_value is not None:
@@ -1144,7 +1169,7 @@ def _daily_to_dict(daily: DailyAggregate) -> dict[str, Any]:
         "date": daily.date.isoformat(),
         "snapshot_count": daily.snapshot_count,
         "metrics": {
-            ds: _metric_stats_to_dict(stats)
+            ds: _metric_stats_to_dict(stats, ds)
             for ds, stats in daily.metrics.items()
             if stats.has_data
         },
@@ -1167,7 +1192,7 @@ def monthly_to_json(agg: MonthlyAggregate) -> dict[str, Any]:
         "role": agg.role,
         "days_with_data": len(agg.daily),
         "summary": {
-            ds: _metric_stats_to_dict(stats)
+            ds: _metric_stats_to_dict(stats, ds)
             for ds, stats in agg.summary.items()
             if stats.has_data
         },
@@ -1190,7 +1215,7 @@ def yearly_to_json(agg: YearlyAggregate) -> dict[str, Any]:
         "role": agg.role,
         "months_with_data": len(agg.monthly),
         "summary": {
-            ds: _metric_stats_to_dict(stats)
+            ds: _metric_stats_to_dict(stats, ds)
             for ds, stats in agg.summary.items()
             if stats.has_data
         },
@@ -1200,7 +1225,7 @@ def yearly_to_json(agg: YearlyAggregate) -> dict[str, Any]:
                 "month": m.month,
                 "days_with_data": len(m.daily),
                 "summary": {
-                    ds: _metric_stats_to_dict(stats)
+                    ds: _metric_stats_to_dict(stats, ds)
                     for ds, stats in m.summary.items()
                     if stats.has_data
                 },
diff --git a/src/meshmon/templates/chart-tooltip.js b/src/meshmon/templates/chart-tooltip.js
index 60e589f..51e966c 100644
--- a/src/meshmon/templates/chart-tooltip.js
+++ b/src/meshmon/templates/chart-tooltip.js
@@ -58,7 +58,8 @@
       month: 'short',
       day: 'numeric',
       hour: '2-digit',
-      minute: '2-digit'
+      minute: '2-digit',
+      timeZoneName: 'short'
     };
 
     // For year view, include year
@@ -180,15 +181,23 @@
     const yMin = parseFloat(svg.dataset.yMin);
     const yMax = parseFloat(svg.dataset.yMax);
 
-    // Find the path with data-points
-    const path = svg.querySelector('path[data-points]');
+    // Find the primary line path for precise coordinates
+    const path =
+      svg.querySelector('path#chart-line') ||
+      svg.querySelector('path[gid="chart-line"]') ||
+      svg.querySelector('#chart-line path') ||
+      svg.querySelector('[gid="chart-line"] path') ||
+      svg.querySelector('path[data-points]');
     if (!path) return;
 
-    // Parse and cache data points and path coordinates on first access
-    if (!path._dataPoints) {
+    const pointsSource = path.dataset.points || svg.dataset.points;
+    if (!pointsSource) return;
+
+    // Parse and cache data points on first access
+    if (!svg._dataPoints) {
       try {
-        const json = path.dataset.points.replace(/&quot;/g, '"');
-        path._dataPoints = JSON.parse(json);
+        const json = pointsSource.replace(/&quot;/g, '"');
+        svg._dataPoints = JSON.parse(json);
       } catch (e) {
         console.warn('Failed to parse chart data:', e);
         return;
@@ -220,7 +229,7 @@
     const targetTs = xStart + clampedRelX * (xEnd - xStart);
 
     // Find closest data point by timestamp
-    const result = findClosestPoint(path._dataPoints, targetTs);
+    const result = findClosestPoint(svg._dataPoints, targetTs);
     if (!result) return;
 
     const { point } = result;