# Battery Master 12V — Battery Master

> Lead-acid battery testing and health assessment tool. (iPhone/iPad app by Shenzhen Leagend Optoelectronics Co., Ltd..)

- Source: https://appshunter.io/ios/app/battery-master-12v/id1480710112 (this page in markdown: same URL + `.md`)
- Developer: [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621)
- Category: Utilities
- Price: Free
- Rating: 3.40/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 39 MB
- Languages: American English, French (France), German (Germany), Chinese (Simplified, China), European Spanish
- Released: 2019-09-20
- Data updated: 2026-08-18
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/battery-master-12v/id1480710112/reviews.md

## What is Battery Master 12V?

Battery Master is the detection tool for lead acid battery. 
By installed on battery, it can intelligently test battery CCA and health condition, calculate battery available use life based on temperature and CCA data sheet. When phone is close to device, the app will automatically obtain battery test result. Also, user can alternatively test battery health, cranking system and charging system. All saved history test results can be shared and printed out.

## Key features

- Lead-acid battery detection
- Test battery CCA and health
- Calculate available use life
- Test cranking system
- Test charging system
- Share and print test results

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/battery-master-12v/id1480710112/reviews.md

### 2/5 — Naja

*2022-02-08*

Ausbaufähig, zeigt krumme Werte wie zum Bsp -12 Grad bei tatsächlichen 10 Grad Plus

### 1/5 — Kein Stern!

*2021-07-15*

App funktioniert nicht, es lässt sich keine Batterie anlegen, bzw. einrichten. Gerät ist damit unbrauchbar!!!!!

### 3/5 — Unlike other monitors, no bt serial detection

*2020-09-04*

Unlike other monitors, no bt serial detection

## Frequently asked questions about Battery Master 12V

### What kind of batteries does Battery Master 12V test?

Battery Master 12V is designed specifically for testing lead-acid batteries. It can intelligently assess their CCA and overall health condition.

### How does Battery Master 12V calculate battery life?

It calculates the available use life of the battery by considering both temperature data and the battery's CCA (Cold Cranking Amps) data sheet.

### Can I test other battery systems with Battery Master 12V?

Yes, in addition to battery health, users can alternatively test the vehicle's cranking system and charging system for comprehensive diagnostics.

### How can I save or share my battery test results?

All saved history test results from Battery Master 12V can be easily shared with others or printed out for your records.

### Does Battery Master 12V require a physical device to work?

Yes, the app requires installation on a battery to perform its detection and testing functions. It automatically obtains test results when your phone is close to the device.

### What devices is Battery Master 12V compatible with?

Battery Master 12V is available for iPhone and iPod devices. It has an age rating of 4+.

### How often is Battery Master 12V updated?

The latest version of Battery Master 12V is 1.6.4, which was last updated on March 30, 2026. This indicates a recent update.

### What is the user rating for Battery Master 12V?

Battery Master 12V has a user rating of 3.4 stars based on 5 ratings. This suggests mixed user experiences.

## Version history (last 5 releases)

### 1.6.4 — 2026-03-30

1. New support for iOS 26 has been added.

### 1.6.3 — 2026-03-18

Several known issues have been fixed.

### 1.6.2 — 2026-03-16

Several known issues have been fixed.

### 1.6.1 — 2024-10-16

Modify details

### 1.6.0 — 2024-01-09

Add support for new device programs
Optimize historical data curve details

## Apps similar to Battery Master 12V

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Battery Monitor BM2](https://appshunter.io/ios/app/battery-monitor-bm2/id1115492033) | 4.1 (59) | Free | Utilities |
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| [Battery HD+](https://appshunter.io/ios/app/battery-hd-plus/id331453283) | 4.5 (2,714) | Free | Utilities |
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## More apps by Shenzhen Leagend Optoelectronics Co., Ltd.

- [BLUE LIGHT](https://appshunter.io/ios/app/blue-light/id998450290)
- [OBD Pro](https://appshunter.io/ios/app/obd-pro/id1063199690)
- [Leagend Auto battery tester](https://appshunter.io/ios/app/leagend-auto-battery-tester/id1090786879)
- [BT1 Tester](https://appshunter.io/ios/app/bt1-tester/id1098097935)
- [Battery Monitor BM2](https://appshunter.io/ios/app/battery-monitor-bm2/id1115492033)
- [OBD Plus](https://appshunter.io/ios/app/obd-plus/id1208901144)

All apps by Shenzhen Leagend Optoelectronics Co., Ltd.: https://appshunter.io/developer/6798210621

## Related topics

[battery testing master](https://appshunter.io/ios/topics/battery-testing-master)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*