# Battery Master 12V

> "Battery Master 12V" is the detection tool for lead acid battery.

Canonical page: [https://chrome-stats.com/d/com.leagend.bt2000\_app](https://chrome-stats.com/d/com.leagend.bt2000_app)

## Overview

- **ID:** `com.leagend.bt2000_app`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** taiwanyichengkeji
- **Category:** TOOLS
- **Downloads:** 102,347
- **Rating:** 4.24 / 5 (617 ratings)
- **Version:** 2.7.4
- **Last updated:** 2025-11-04
- **First published:** 2020-02-21
- **Publisher country:** CN
- **Size:** 33 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.leagend.bt2000_app)
- **Website:** [http://www.taiwanyichengkeji.com](http://www.taiwanyichengkeji.com/)
- **Privacy policy:** [http://doc.quicklynks.com/bt2000/privacy-policy/index.html](http://doc.quicklynks.com/bt2000/privacy-policy/index.html)

## Description

**Battery Master 12V** is an intelligent detection tool designed specifically for lead acid batteries. When installed on a battery, it accurately tests the battery's Cold Cranking Amps (CCA) and overall health condition. Using temperature and CCA data sheets, it calculates the available usable life of the battery for precise monitoring.

The app seamlessly syncs with the device when your phone is nearby to automatically retrieve test results. Users can also test the battery health, cranking system, and charging system manually. In addition, all saved historical test results can be conveniently shared or printed for record-keeping and analysis. This extension ensures efficient battery diagnostics and maintenance for automotive and related applications.

## Rankings

- #218,937 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_BACKGROUND_LOCATION`
- `android.permission.ACCESS_COARSE_LOCATION`
- `android.permission.ACCESS_FINE_LOCATION`
- `android.permission.ACCESS_LOCATION_EXTRA_COMMANDS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_WIFI_STATE`
- `android.permission.BLUETOOTH_CONNECT`
- `android.permission.BLUETOOTH_SCAN`
- `android.permission.CAMERA`
- `android.permission.CHANGE_NETWORK_STATE`
- `android.permission.CHANGE_WIFI_STATE`
- `android.permission.FLASHLIGHT`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE`
- `android.permission.INTERNET`
- `android.permission.MODIFY_AUDIO_SETTINGS`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.READ_MEDIA_AUDIO`
- `android.permission.READ_MEDIA_IMAGES`
- `android.permission.READ_MEDIA_VIDEO`
- `android.permission.RECORD_AUDIO`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.google.android.gms.permission.AD_ID`
- `com.huawei.android.launcher.permission.CHANGE_BADGE`
- `com.leagend.bt2000_app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.vivo.notification.permission.BADGE_ICON`

## Review summary

Battery Master 12V has mixed reviews. Some users praise its battery monitoring features and device support. However, many report frequent crashes, high battery consumption, connectivity problems, and mandatory login requirements. There are also concerns regarding data privacy and possible fraudulent activity. Overall, while the app has useful features, stability and trust issues persist for numerous users.

### Pros

- Some users find the app helpful for monitoring their phone's battery and give it high ratings.
- The app supports certain smartphone models like HUAWEI Y9A FRL.
- It provides battery charge information that some users can confirm as accurate.

### Cons

- The app often crashes or stops working after updates.
- Requires login and sometimes email, which users dislike.
- The app consumes high power and runs services in the background, causing battery drain.
- Connection issues such as frequent disconnections and needing to disable mobile data to maintain Bluetooth connectivity.
- Concerns about data privacy and suspicion of collecting sensitive information or being fraudulent.

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.leagend.bt2000_app)