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Battery Widget
Download .DMG

macOS 13+ · Apple Silicon · MIT

iPhone and Mac battery, always in view.

A lightweight floating widget and full battery lab for MacBooks, iPhones, and iPads. Live cells, thermals, and health — without leaving the desktop.

Download .DMGGitHub

v1.0.0 · 2.7 MB · iPhoneBatteryWidget-Installer.dmg

Desktop

00:00

MacBook Air

MacBook Air 13" (M2, 2022) · macOS 26.0

87%

87%

Charging
+47.9 W

Thermistor
37.0°C
Voltage
12.41 V
Current
3.85 A
Cycles
312
Battery health98.4%

MacBook

iPhone

usbmuxd

Wi-Fi sync

On-device only

Capabilities

Hardware numbers, not guesses.

The widget reads IOKit on the Mac and lockdown on iOS. What you see is what the cells are doing — wattage, current, voltage, cycles, and board temperature.

Live multi-device tracking

Capacity, wattage, amperage, voltage, and cycle counts for your Mac and every connected iPhone or iPad — at the same time.

Hardware NTC thermistor

Temperature straight from internal sensors, with thermal gradients and high-heat alerts instead of a guessed software reading.

Degradation trajectories

Historical health curves, 24-hour temperature charts, CSV export, and coconutBattery archive import.

USB first, Wi-Fi fallback

Native usbmuxd lockdown for a high-speed cable link, then seamless Wi-Fi sync when you unplug.

Lid and session tracker

MacBook clamshell open and close, work sessions, and screen-on time — logged automatically.

Always-on-top glass widget

A translucent dark panel that docks anywhere on the desktop and stays readable over whatever you are doing.

Archive

Health over years, not just today.

Open the dashboard for degradation curves, cycle history, and a 24-hour thermal trace. Export CSV, or bring in a coconutBattery archive.

Battery Archive
Battery degradation archive and settings dashboard showing health curves, cycle counts, and thermal history

Archive preview

Sample MacBook Air M2 · 312 cycles · coconutBattery-compatible

Floating glassmorphic desktop widget showing MacBook and iPhone battery levels

How it works

Dual connection. Local history.

  1. 01

    Plug in, or stay on Wi-Fi

    USB lockdown is the fast path. Unplug and the same session continues over Wi-Fi if the device is paired.

  2. 02

    Read the cells directly

    IOKit and usbmuxd expose wattage, amperage, voltage, cycle count, and NTC temperature — not a rounded Control Center guess.

  3. 03

    Keep a private archive

    Every sample lands in a local history log. Chart it, export it, or overlay coconutBattery data. Nothing leaves the machine.

Install

Download the DMG.

Apple Silicon, macOS 13 or later. Open the disk image and drag iPhone Battery Widget into Applications. Or build from source with Xcode Command Line Tools.

Download .DMGSource

iPhoneBatteryWidget-Installer.dmg · v1.0.0 · 2.7 MB

Build from source

git clone https://github.com/LondonVista/iPhoneBatteryWidget.git
cd iPhoneBatteryWidget
./build.sh --release

Questions