diff --git a/frontend/src/components/health/BodyBatteryChart.jsx b/frontend/src/components/health/BodyBatteryChart.jsx
new file mode 100644
index 0000000..ec2c652
--- /dev/null
+++ b/frontend/src/components/health/BodyBatteryChart.jsx
@@ -0,0 +1,169 @@
+import {
+  BarChart, Bar, Cell, XAxis, YAxis, Tooltip, ResponsiveContainer, ReferenceArea,
+} from 'recharts'
+import { format } from 'date-fns'
+import SportIcon from '../ui/SportIcon'
+import { sportColor } from '../../utils/format'
+import {
+  BB_INFERRED_COLOR, BB_INFERRED_LABEL, bbLevelColor, inferBBType,
+} from '../../utils/bodyBattery'
+
+const tooltipStyle = { background: '#111827', border: '1px solid #374151', borderRadius: 8, fontSize: 12, color: '#fff' }
+
+// Activity time spans are drawn as a solid coloured band in a reserved strip
+// *below* the battery bars (the negative Y region) so they don't obscure data.
+const ACTIVITY_BAND_BOTTOM = -18
+
+function ActivityRefLabel({ viewBox, sport, size = 14 }) {
+  if (!viewBox) return null
+  const { x, y, width = 0, height = 0 } = viewBox
+  return (
+    <SportIcon sport={sport} size={size} color="#fff"
+      x={x + width / 2 - size / 2} y={y + height / 2 - size / 2}
+      style={{ pointerEvents: 'none' }} />
+  )
+}
+
+// A small ⏸ glyph drawn over the gap between two active spans, marking where
+// the recording was paused mid-activity (e.g. a long lunch break on a ride).
+function PauseRefLabel({ viewBox }) {
+  if (!viewBox) return null
+  const { x, y, width = 0, height = 0 } = viewBox
+  const cx = x + width / 2, cy = y + height / 2
+  const barW = 2, barH = 8, gap = 1.5
+  return (
+    <g style={{ pointerEvents: 'none' }}>
+      <rect x={cx - gap - barW} y={cy - barH / 2} width={barW} height={barH} fill="#fff" opacity={0.85} />
+      <rect x={cx + gap} y={cy - barH / 2} width={barW} height={barH} fill="#fff" opacity={0.85} />
+    </g>
+  )
+}
+
+// Shared Body Battery bar chart used by both the Health page and the Dashboard
+// widget. Renders the stats header, the coloured battery bars, an activity band
+// strip below them (splitting on mid-activity pauses via `active_spans`), and a
+// state legend. The caller supplies the outer frame (panel / Card). Props tune
+// the few cosmetic differences between the two placements.
+export default function BodyBatteryChart({
+  bb, hires, sleepStart, sleepEnd, activities,
+  yTicks = [0, 25, 50, 75, 100], yAxisWidth = 28, leftMargin = 28,
+  fill = false, height = 100, minHeight = 80, iconSize = 14,
+  emptyText = null,
+}) {
+  const raw = (hires?.length ? hires : bb?.values || []).map(([ts, level]) => ({ t: ts, level }))
+  const sleepStartMs = sleepStart ? new Date(sleepStart).getTime() : null
+  const sleepEndMs   = sleepEnd   ? new Date(sleepEnd).getTime()   : null
+  const data = raw.map((d, i) => ({
+    ...d,
+    type: inferBBType(d.t, d.level, i > 0 ? raw[i - 1].level : null, sleepStartMs, sleepEndMs),
+  }))
+
+  const charged = bb?.charged, drained = bb?.drained, end_level = bb?.end_level
+  const peak = data.length ? Math.max(...data.map(d => d.level)) : end_level
+  const presentTypes = [...new Set(data.map(d => d.type))]
+  const hasGraph = data.length >= 2
+
+  // Nothing at all to show.
+  if (!hasGraph && peak == null && end_level == null) return null
+
+  // Only activities overlapping the battery samples for this day get a band.
+  const dayStart = data.length ? data[0].t : null
+  const dayEnd   = data.length ? data[data.length - 1].t : null
+  const dayActivities = (activities || []).filter(a => {
+    if (dayStart == null) return false
+    const start = new Date(a.start_time).getTime()
+    const end = a.duration_s ? start + a.duration_s * 1000 : start
+    return end >= dayStart && start <= dayEnd
+  })
+  const hasActivities = dayActivities.length > 0
+
+  // The X axis is categorical (band scale), so overlays must snap to a sample
+  // that exists in the data.
+  const nearestT = (ms) => {
+    let best = null, bd = Infinity
+    for (const d of data) { const dd = Math.abs(d.t - ms); if (dd < bd) { bd = dd; best = d.t } }
+    return best
+  }
+
+  return (
+    <div className="flex flex-col h-full">
+      <div className="flex items-baseline gap-3 flex-wrap">
+        {peak != null && (
+          <span className="text-3xl font-bold" style={{ color: bbLevelColor(peak) }}>{Math.round(peak)}</span>
+        )}
+        {charged != null && <span className="text-sm font-semibold text-green-400">+{charged}</span>}
+        {drained != null && <span className="text-sm font-semibold text-orange-400">-{drained}</span>}
+        {end_level != null && <span className="text-xs text-gray-500">now {Math.round(end_level)}</span>}
+      </div>
+
+      {hasGraph ? (
+        <>
+          <div className="flex-1 min-h-0 mt-2">
+            <ResponsiveContainer width="100%" height={fill ? '100%' : height} minHeight={minHeight}>
+              <BarChart data={data} margin={{ top: 2, right: 4, bottom: 0, left: leftMargin }} barCategoryGap={0}>
+                <XAxis dataKey="t" tick={{ fontSize: 9, fill: '#6b7280' }} axisLine={false} tickLine={false}
+                  tickFormatter={ts => format(new Date(ts), 'HH:mm')}
+                  interval={Math.max(1, Math.floor(data.length / 6))} />
+                <YAxis domain={[hasActivities ? ACTIVITY_BAND_BOTTOM : 0, 100]} tick={{ fontSize: 9, fill: '#6b7280' }}
+                  axisLine={false} tickLine={false} width={yAxisWidth} ticks={yTicks} />
+                <Tooltip contentStyle={tooltipStyle} itemStyle={{ color: '#fff' }} labelStyle={{ color: '#fff' }}
+                  labelFormatter={ts => format(new Date(ts), 'HH:mm')}
+                  formatter={v => [`${Math.round(v)}%`, 'Battery']} />
+                <Bar dataKey="level" isAnimationActive={false} radius={0}>
+                  {data.map((d, i) => <Cell key={i} fill={BB_INFERRED_COLOR[d.type]} />)}
+                </Bar>
+                {dayActivities.flatMap(a => {
+                  const color = sportColor(a.sport_type)
+                  const start = new Date(a.start_time).getTime()
+                  const fullEnd = a.duration_s ? start + a.duration_s * 1000 : start
+                  // active_spans (set only when a long pause splits the
+                  // recording) draws one band per moving span with the pause
+                  // shown as a gap; otherwise one continuous band.
+                  const spans = (a.active_spans && a.active_spans.length > 1)
+                    ? a.active_spans
+                    : [[start, fullEnd]]
+                  // Carry the sport icon on the longest span only.
+                  let labelIdx = 0, labelLen = -1
+                  spans.forEach((s, i) => { const l = s[1] - s[0]; if (l > labelLen) { labelLen = l; labelIdx = i } })
+                  const els = []
+                  spans.forEach((s, i) => {
+                    const x1 = nearestT(s[0]), x2 = nearestT(s[1])
+                    if (x1 != null && x2 != null) {
+                      els.push(
+                        <ReferenceArea key={`area-${a.id}-${i}`} x1={x1} x2={x2} y1={0} y2={ACTIVITY_BAND_BOTTOM}
+                          fill={color} fillOpacity={0.9} stroke={color} strokeOpacity={1}
+                          label={i === labelIdx ? <ActivityRefLabel sport={a.sport_type} size={iconSize} /> : undefined} />
+                      )
+                    }
+                    // Mark the paused stretch before the next span.
+                    if (i < spans.length - 1) {
+                      const g1 = nearestT(s[1]), g2 = nearestT(spans[i + 1][0])
+                      if (g1 != null && g2 != null && g1 !== g2) {
+                        els.push(
+                          <ReferenceArea key={`pause-${a.id}-${i}`} x1={g1} x2={g2} y1={0} y2={ACTIVITY_BAND_BOTTOM}
+                            fill={color} fillOpacity={0.12} stroke={color} strokeOpacity={0.7} strokeDasharray="3 3"
+                            label={<PauseRefLabel />} />
+                        )
+                      }
+                    }
+                  })
+                  return els
+                })}
+              </BarChart>
+            </ResponsiveContainer>
+          </div>
+          <div className="flex flex-wrap gap-x-3 gap-y-1 mt-2">
+            {presentTypes.map(type => (
+              <div key={type} className="flex items-center gap-1">
+                <div className="w-2 h-2 rounded-sm" style={{ backgroundColor: BB_INFERRED_COLOR[type] }} />
+                <span className="text-xs text-gray-500">{BB_INFERRED_LABEL[type]}</span>
+              </div>
+            ))}
+          </div>
+        </>
+      ) : (
+        emptyText ? <p className="text-xs text-gray-600 mt-3">{emptyText}</p> : null
+      )}
+    </div>
+  )
+}
diff --git a/frontend/src/pages/DashboardPage.jsx b/frontend/src/pages/DashboardPage.jsx
index 5578a32..6966de0 100644
--- a/frontend/src/pages/DashboardPage.jsx
+++ b/frontend/src/pages/DashboardPage.jsx
@@ -2,7 +2,7 @@ import { Link, useNavigate } from 'react-router-dom'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { useMemo, useState, useEffect, useRef } from 'react'
 import {
-  BarChart, Bar, AreaChart, Area, Cell, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, ReferenceArea,
+  BarChart, Bar, AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer,
 } from 'recharts'
 import GridLayout, { WidthProvider } from 'react-grid-layout'
 import 'react-grid-layout/css/styles.css'
@@ -13,6 +13,7 @@ import { useIsMobile } from '../hooks/useMediaQuery'
 import StatCard from '../components/ui/StatCard'
 import HrvBadge from '../components/ui/HrvBadge'
 import SleepHypnogram from '../components/health/SleepHypnogram'
+import BodyBatteryChart from '../components/health/BodyBatteryChart'
 import ActivityMap from '../components/activity/ActivityMap'
 import {
   formatDuration, formatDistance, formatHeartRate, formatElevation,
@@ -21,7 +22,6 @@ import {
 import { useUnit } from '../hooks/useUnits'
 import SportIcon from '../components/ui/SportIcon'
 import { vo2Color } from '../utils/vo2'
-import { BB_INFERRED_COLOR, BB_INFERRED_LABEL, bbLevelColor, inferBBType } from '../utils/bodyBattery'
 
 const Grid = WidthProvider(GridLayout)
 
@@ -107,105 +107,15 @@ function Stat({ label, value }) {
 
 // ── Chart widgets ────────────────────────────────────────────────────────────
 
-// Sport icon centred inside the activity band that sits below the battery bars.
-function BBActivityRefLabel({ viewBox, sport }) {
-  if (!viewBox) return null
-  const { x, y, width = 0, height = 0 } = viewBox
-  const size = 13
-  return (
-    <SportIcon sport={sport} size={size} color="#fff"
-      x={x + width / 2 - size / 2} y={y + height / 2 - size / 2}
-      style={{ pointerEvents: 'none' }} />
-  )
-}
-
-// Activities are drawn as solid coloured bands in a reserved strip below the
-// battery bars (the negative Y region) so they don't obscure the data.
-const BB_ACTIVITY_BAND_BOTTOM = -18
-
+// Body Battery widget — wraps the shared BodyBatteryChart in a dashboard Card.
+// The dashboard variant fills its grid cell (fill) and uses a compact y-axis.
 function BodyBatteryToday({ bb, hires, sleepStart, sleepEnd, activities }) {
-  const raw = (hires?.length ? hires : bb?.values || []).map(([ts, level]) => ({ t: ts, level }))
-  const sleepStartMs = sleepStart ? new Date(sleepStart).getTime() : null
-  const sleepEndMs   = sleepEnd   ? new Date(sleepEnd).getTime()   : null
-  const data = raw.map((d, i) => ({
-    ...d,
-    type: inferBBType(d.t, d.level, i > 0 ? raw[i - 1].level : null, sleepStartMs, sleepEndMs),
-  }))
-  const charged = bb?.charged, drained = bb?.drained, end_level = bb?.end_level
-  const peak = data.length ? Math.max(...data.map(d => d.level)) : end_level
-  const hasGraph = data.length >= 2
-  const presentTypes = [...new Set(data.map(d => d.type))]
-
-  // Only activities that overlap the battery samples for this day.
-  const dayStart = data.length ? data[0].t : null
-  const dayEnd   = data.length ? data[data.length - 1].t : null
-  const dayActivities = (activities || []).filter(a => {
-    if (dayStart == null) return false
-    const start = new Date(a.start_time).getTime()
-    const end = a.duration_s ? start + a.duration_s * 1000 : start
-    return end >= dayStart && start <= dayEnd
-  })
-  const hasActivities = dayActivities.length > 0
-
-  // The X axis is categorical, so overlays must snap to a sample that exists.
-  const nearestT = (ms) => {
-    let best = null, bd = Infinity
-    for (const d of data) { const dd = Math.abs(d.t - ms); if (dd < bd) { bd = dd; best = d.t } }
-    return best
-  }
-
   return (
     <Card title="Body Battery" viewHref="/health">
-      <div className="flex flex-col h-full">
-        <div className="flex items-baseline gap-3 flex-wrap">
-          {peak != null && <span className="text-3xl font-bold" style={{ color: bbLevelColor(peak) }}>{Math.round(peak)}</span>}
-          {charged != null && <span className="text-sm font-semibold text-green-400">+{charged}</span>}
-          {drained != null && <span className="text-sm font-semibold text-orange-400">-{drained}</span>}
-          {end_level != null && <span className="text-xs text-gray-500">now {Math.round(end_level)}</span>}
-        </div>
-        {hasGraph ? (
-          <>
-            <div className="flex-1 min-h-0 mt-2">
-              <ResponsiveContainer width="100%" height="100%" minHeight={80}>
-                <BarChart data={data} margin={{ top: 2, right: 4, bottom: 0, left: 0 }} barCategoryGap={0}>
-                  <XAxis dataKey="t" tick={{ fontSize: 9, fill: '#6b7280' }} axisLine={false} tickLine={false}
-                    tickFormatter={ts => format(new Date(ts), 'HH:mm')}
-                    interval={Math.max(1, Math.floor(data.length / 6))} />
-                  <YAxis domain={[hasActivities ? BB_ACTIVITY_BAND_BOTTOM : 0, 100]} tick={{ fontSize: 9, fill: '#6b7280' }}
-                    axisLine={false} tickLine={false} width={26} ticks={[0, 50, 100]} />
-                  <Tooltip contentStyle={tooltipStyle} itemStyle={{ color: '#fff' }} labelStyle={{ color: '#fff' }}
-                    labelFormatter={ts => format(new Date(ts), 'HH:mm')} formatter={v => [`${Math.round(v)}%`, 'Battery']} />
-                  <Bar dataKey="level" isAnimationActive={false} radius={0}>
-                    {data.map((d, i) => <Cell key={i} fill={BB_INFERRED_COLOR[d.type]} />)}
-                  </Bar>
-                  {dayActivities.map(a => {
-                    const start = new Date(a.start_time).getTime()
-                    const end = a.duration_s ? start + a.duration_s * 1000 : start
-                    const x1 = nearestT(start), x2 = nearestT(end)
-                    if (x1 == null || x2 == null) return null
-                    const color = sportColor(a.sport_type)
-                    return (
-                      <ReferenceArea key={`area-${a.id}`} x1={x1} x2={x2} y1={0} y2={BB_ACTIVITY_BAND_BOTTOM}
-                        fill={color} fillOpacity={0.9} stroke={color} strokeOpacity={1}
-                        label={<BBActivityRefLabel sport={a.sport_type} />} />
-                    )
-                  })}
-                </BarChart>
-              </ResponsiveContainer>
-            </div>
-            <div className="flex flex-wrap gap-x-3 gap-y-1 mt-2">
-              {presentTypes.map(type => (
-                <div key={type} className="flex items-center gap-1">
-                  <div className="w-2 h-2 rounded-sm" style={{ backgroundColor: BB_INFERRED_COLOR[type] }} />
-                  <span className="text-xs text-gray-500">{BB_INFERRED_LABEL[type]}</span>
-                </div>
-              ))}
-            </div>
-          </>
-        ) : (
-          <p className="text-xs text-gray-600 mt-3">No body battery data today</p>
-        )}
-      </div>
+      <BodyBatteryChart
+        bb={bb} hires={hires} sleepStart={sleepStart} sleepEnd={sleepEnd} activities={activities}
+        fill yTicks={[0, 50, 100]} yAxisWidth={26} leftMargin={0} iconSize={13}
+        emptyText="No body battery data today" />
     </Card>
   )
 }
diff --git a/frontend/src/pages/HealthPage.jsx b/frontend/src/pages/HealthPage.jsx
index f992705..a1b7a65 100644
--- a/frontend/src/pages/HealthPage.jsx
+++ b/frontend/src/pages/HealthPage.jsx
@@ -1,17 +1,16 @@
 import { useState, useMemo } from 'react'
 import { useQuery, keepPreviousData } from '@tanstack/react-query'
 import {
-  AreaChart, Area, ComposedChart, Line, BarChart, Bar, ReferenceLine, ReferenceArea,
-  XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, Cell,
+  AreaChart, Area, ComposedChart, Line, BarChart, Bar, ReferenceLine,
+  XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer,
 } from 'recharts'
 import { format, subDays, differenceInCalendarDays, parseISO } from 'date-fns'
 import api from '../utils/api'
-import { formatSleep, sportColor } from '../utils/format'
-import { BB_INFERRED_COLOR, BB_INFERRED_LABEL, bbLevelColor, inferBBType } from '../utils/bodyBattery'
+import { formatSleep } from '../utils/format'
 import HrvBadge from '../components/ui/HrvBadge'
-import SportIcon from '../components/ui/SportIcon'
 import { VO2_CATEGORIES, getVo2Category, vo2Thresholds, vo2Color } from '../utils/vo2'
 import SleepHypnogram from '../components/health/SleepHypnogram'
+import BodyBatteryChart from '../components/health/BodyBatteryChart'
 
 const RANGES = [
   { label: '1W',  days: 7 },
@@ -148,154 +147,14 @@ function IntradayHrChart({ values }) {
 
 // ── Body Battery ─────────────────────────────────────────────────────────────
 
-function ActivityRefLabel({ viewBox, sport }) {
-  if (!viewBox) return null
-  const { x, y, width = 0, height = 0 } = viewBox
-  const size = 14
-  return (
-    <SportIcon sport={sport} size={size} color="#fff"
-      x={x + width / 2 - size / 2} y={y + height / 2 - size / 2}
-      style={{ pointerEvents: 'none' }} />
-  )
-}
-
-// A small ⏸ glyph drawn over the gap between two active spans, marking where
-// the recording was paused mid-activity (e.g. a long lunch break on a ride).
-function PauseRefLabel({ viewBox }) {
-  if (!viewBox) return null
-  const { x, y, width = 0, height = 0 } = viewBox
-  const cx = x + width / 2, cy = y + height / 2
-  const barW = 2, barH = 8, gap = 1.5
-  return (
-    <g style={{ pointerEvents: 'none' }}>
-      <rect x={cx - gap - barW} y={cy - barH / 2} width={barW} height={barH} fill="#fff" opacity={0.85} />
-      <rect x={cx + gap} y={cy - barH / 2} width={barW} height={barH} fill="#fff" opacity={0.85} />
-    </g>
-  )
-}
-
-// Activity time spans are drawn as a solid coloured band in a reserved strip
-// *below* the battery bars (the negative Y region) so they don't obscure the data.
-const ACTIVITY_BAND_BOTTOM = -18
-
-function BodyBatteryChart({ bb, hiresValues, sleepStart, sleepEnd, activities }) {
-  if (!bb) return null
-  const { charged, drained, start_level, end_level } = bb
-  if (!hiresValues?.length && !bb.values?.length && end_level == null) return null
-
-  const rawData = hiresValues?.length
-    ? hiresValues.map(([ts, level]) => ({ t: ts, level }))
-    : (bb.values || []).map(([ts, level]) => ({ t: ts, level }))
-
-  if (!rawData.length) return null
-
-  const sleepStartMs = sleepStart ? new Date(sleepStart).getTime() : null
-  const sleepEndMs   = sleepEnd   ? new Date(sleepEnd).getTime()   : null
-
-  const chartData = rawData.map((d, i) => ({
-    ...d,
-    type: inferBBType(d.t, d.level, i > 0 ? rawData[i - 1].level : null, sleepStartMs, sleepEndMs),
-  }))
-
-  const presentTypes = [...new Set(chartData.map(d => d.type))]
-  const levelColor = bbLevelColor(end_level)
-  const maxLevel = chartData.length ? Math.max(...chartData.map(d => d.level)) : null
-
-  // The X axis is categorical (band scale), so overlays must use values that
-  // exist in the data — snap activity start/end to the nearest sample.
-  const nearestT = (ms) => {
-    let best = null, bd = Infinity
-    for (const d of chartData) { const dd = Math.abs(d.t - ms); if (dd < bd) { bd = dd; best = d.t } }
-    return best
-  }
-
-  const hasActivities = (activities || []).length > 0
-
+// Health-page Body Battery panel — the shared BodyBatteryChart in this page's
+// card frame. Uses a fixed chart height (the panel has no intrinsic height).
+function BodyBatteryPanel({ bb, hiresValues, sleepStart, sleepEnd, activities }) {
   return (
     <div className="bg-gray-900 rounded-xl border border-gray-800 p-4 flex flex-col h-full">
       <h3 className="text-sm font-medium text-gray-300 mb-2">Body Battery</h3>
-
-      <div className="flex items-baseline gap-3 flex-wrap mb-3">
-        {maxLevel != null && (
-          <span className="text-3xl font-bold" style={{ color: bbLevelColor(maxLevel) }}>{Math.round(maxLevel)}</span>
-        )}
-        {charged != null && (
-          <span className="text-sm font-semibold text-green-400">+{charged}</span>
-        )}
-        {drained != null && (
-          <span className="text-sm font-semibold text-orange-400">-{drained}</span>
-        )}
-        {end_level != null && (
-          <span className="text-xs text-gray-500">now {Math.round(end_level)}</span>
-        )}
-      </div>
-
-      <div className="flex-1">
-        <ResponsiveContainer width="100%" height={100}>
-          <BarChart data={chartData} margin={{ top: 2, right: 4, bottom: 0, left: 28 }} barCategoryGap={0}>
-            <XAxis dataKey="t" tick={{ fontSize: 9, fill: '#6b7280' }} axisLine={false} tickLine={false}
-              tickFormatter={ts => format(new Date(ts), 'HH:mm')}
-              interval={Math.max(1, Math.floor(chartData.length / 6))} />
-            <YAxis domain={[hasActivities ? ACTIVITY_BAND_BOTTOM : 0, 100]} tick={{ fontSize: 9, fill: '#6b7280' }}
-              axisLine={false} tickLine={false} width={28}
-              tickFormatter={v => v} ticks={[0, 25, 50, 75, 100]} />
-            <Tooltip contentStyle={tooltipStyle} itemStyle={{ color: '#fff' }} labelStyle={{ color: '#fff' }}
-              labelFormatter={ts => format(new Date(ts), 'HH:mm')}
-              formatter={v => [`${Math.round(v)}%`, 'Battery']} />
-            <Bar dataKey="level" isAnimationActive={false} radius={0}>
-              {chartData.map((d, i) => (
-                <Cell key={i} fill={BB_INFERRED_COLOR[d.type]} />
-              ))}
-            </Bar>
-            {(activities || []).flatMap(a => {
-              const color = sportColor(a.sport_type)
-              const start = new Date(a.start_time).getTime()
-              const fullEnd = a.duration_s ? start + a.duration_s * 1000 : start
-              // active_spans (set only when a long pause splits the recording)
-              // draws one band per moving span with the pause shown as a gap;
-              // otherwise one continuous band as before.
-              const spans = (a.active_spans && a.active_spans.length > 1)
-                ? a.active_spans
-                : [[start, fullEnd]]
-              // Carry the sport icon on the longest span only.
-              let labelIdx = 0, labelLen = -1
-              spans.forEach((s, i) => { const l = s[1] - s[0]; if (l > labelLen) { labelLen = l; labelIdx = i } })
-              const els = []
-              spans.forEach((s, i) => {
-                const x1 = nearestT(s[0]), x2 = nearestT(s[1])
-                if (x1 != null && x2 != null) {
-                  els.push(
-                    <ReferenceArea key={`area-${a.id}-${i}`} x1={x1} x2={x2} y1={0} y2={ACTIVITY_BAND_BOTTOM}
-                      fill={color} fillOpacity={0.9} stroke={color} strokeOpacity={1}
-                      label={i === labelIdx ? <ActivityRefLabel sport={a.sport_type} /> : undefined} />
-                  )
-                }
-                // Mark the paused stretch before the next span with a faint dashed strip + ⏸.
-                if (i < spans.length - 1) {
-                  const g1 = nearestT(s[1]), g2 = nearestT(spans[i + 1][0])
-                  if (g1 != null && g2 != null && g1 !== g2) {
-                    els.push(
-                      <ReferenceArea key={`pause-${a.id}-${i}`} x1={g1} x2={g2} y1={0} y2={ACTIVITY_BAND_BOTTOM}
-                        fill={color} fillOpacity={0.12} stroke={color} strokeOpacity={0.7} strokeDasharray="3 3"
-                        label={<PauseRefLabel />} />
-                    )
-                  }
-                }
-              })
-              return els
-            })}
-          </BarChart>
-        </ResponsiveContainer>
-      </div>
-
-      <div className="flex flex-wrap gap-x-3 gap-y-1 mt-2">
-        {presentTypes.map(type => (
-          <div key={type} className="flex items-center gap-1">
-            <div className="w-2 h-2 rounded-sm" style={{ backgroundColor: BB_INFERRED_COLOR[type] }} />
-            <span className="text-xs text-gray-500">{BB_INFERRED_LABEL[type]}</span>
-          </div>
-        ))}
-      </div>
+      <BodyBatteryChart
+        bb={bb} hires={hiresValues} sleepStart={sleepStart} sleepEnd={sleepEnd} activities={activities} />
     </div>
   )
 }
@@ -497,7 +356,7 @@ function DailySnapshot({ day, snapshotWeight, avg30, intradayHr, bodyBattery, bb
               </div>
             </div>
           )}
-          <BodyBatteryChart bb={bodyBattery} hiresValues={bbHires} sleepStart={day?.sleep_start} sleepEnd={day?.sleep_end} activities={activities} />
+          <BodyBatteryPanel bb={bodyBattery} hiresValues={bbHires} sleepStart={day?.sleep_start} sleepEnd={day?.sleep_end} activities={activities} />
         </div>
       )}