Battery Status

import { batteryStatus } from "mobx-web-api";

Allows tracking battery level and charging state.

What's inside

Uses Battery Status API under the hood.

Usage

import { batteryStatus } from "mobx-web-api";
import { reaction } from "mobx";

console.log(batteryStatus.levelPercent); // 0..100

reaction(
  () => batteryStatus.isLow,
  (isLow) => {
    if (isLow) {
      console.log("Battery is low, turn off background sync");
    }
  }
);

Properties

isSupported

true when navigator.getBattery exists.

level

Battery level as a number from 0 to 1.

levelPercent

Battery level as percent from 0 to 100.

charging

true when device is currently charging.

chargingTime

Estimated seconds until fully charged.

dischargingTime

Estimated seconds until battery is empty.

isLow

true when battery is at or below 20% and not charging.

error

Last error happened while loading battery manager.

retry()

Retries reading battery manager and clears previous error.

Notes

• Battery API is not supported in many browsers.
• When unsupported, object returns safe defaults and isSupported === false.