Vgate BA100 – Bluetooth Battery Tester & Battery Monitor 6–20V (6V/12V) for Android/iOS with “Battery Asst” app
Short version
Vgate BA100 is a compact electronic battery tester and battery monitor that connects directly to the battery and transmits data wirelessly via Bluetooth 4.0 to your mobile phone or tablet. With the free app “Battery Asst” (BT-name: Battery Asst) you can monitor the battery status in real-time and get a better overview of battery health, starting capability, and charging.
The BA100 supports 6–20V and is designed for vehicles with 6V/12V battery systems. It can monitor battery health, test the cranking system and charging system, and save test results and display history directly in the app. The automatic synchronization feature ensures smooth data updates, and you can receive notifications/warnings if anything looks abnormal.
For safer installation, it has both short-circuit protection and reverse connection protection. It is small and easy to place with dimensions of 5.6 × 4 × 1.6 cm, and works in harsh environments with a specified operating temperature of -40 to 90°C. The voltage accuracy within 9–16V is stated as ±0.03V.
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Voltage support: 6–20V (6V/12V)
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Connection: Wireless BT4.0
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App: Battery Asst (Android/iOS)
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Protection: short-circuit + reverse connection
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History: saves & displays previous data
✅ Perfect for those who want to prevent starting problems and keep track of their battery – in cars, classic cars, smaller machines, and other 6/12V systems.
What is Vgate BA100?
The BA100 is a small device mounted on the battery that acts as a battery assistant: it monitors and logs battery data, and displays it on your mobile phone via Bluetooth. The goal is to allow you to detect problems early, such as a weak battery, abnormal charging, or large voltage drops during startup.
It is specified for 6–20V and specifically mentions 12V car batteries (“as long as it is a 12v battery…”), making it practical for most passenger cars and many other 12V applications.
Features (according to product description)
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Easy to install directly on the battery.
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Real-time monitoring of battery health.
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Tests cranking system and charging system.
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Stores and displays history.
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Saves test records.
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Automatic synchronization.
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Free app for Android and iOS.
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Alert notifications.
The “Battery Asst” app (Android/iOS)
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BT-name: Battery Asst
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App-name: Battery Asst
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System: Android & iOS (mobile phone and tablet)
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Software version: v1.0.5 (according to text)
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Languages: English, Chinese, German, French, Russian, Polish, Italian, Portuguese
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Multilingual: “Depend on the phone system languages” is mentioned in the specification
In the app, you can view real-time battery status, review history, and save test results. Notifications help you catch problems before you're stuck with a battery that won't start.
Specifications
Basic data
| Product |
Vgate BA100 Battery Tester |
| Dimensions |
5.6 × 4 × 1.6 cm |
| Input Voltage / Support |
6–20V |
| Voltage Accuracy (9–16V) |
±0.03V |
| Operating Temperature |
-40 to 90°C |
| Connection |
Wireless BT4.0 |
| Protection |
Short-circuit protection + reverse connection protection |
Power consumption (note)
The documentation states both Average Current: 1mA and in the specification Current: 15mA. This may be due to different modes (e.g., active/sleep) or different measurement methods in product texts. During installation, it may be helpful to consider that actual behavior is affected by how often the device is active and connected via Bluetooth.
Installation & usage – step by step
1) Mount on the battery
- Turn off the vehicle and ensure you are working safely around the battery.
- Connect the BA100 according to polarity (positive to positive, negative to negative).
- Thanks to reverse connection and short-circuit protection, it is designed for safer handling, but still be careful.
2) Install the app
- Download the Battery Asst app on Android or iOS.
- Activate Bluetooth on your phone.
3) Pair and read data
- Open the app and look for the device with the BT-name Battery Asst.
- Select the device and connect.
- Review real-time data and history, and perform cranking and charging tests as needed.
4) Activate notifications
Turn on alert notifications to receive a signal if the battery status deviates or if something needs attention.
FAQ – Frequently Asked Questions
1) Does it work on a 12V car?
Yes, it is specified for 6–20V and the product text says it works for a 12V car as long as it is a 12V battery.
2) Does it work on 6V systems?
Yes, voltage support starts at 6V (6–20V).
3) Does it work on 24V?
It is specified up to 20V, so it is not listed as 24V support for the battery voltage itself.
4) What can it test?
It monitors battery health in real-time and can test the cranking and charging system, and save history.
5) Do I have to pay for the app?
According to the product description, the app is free to download for Android and iOS.
6) Which languages are available?
English, Chinese, German, French, Russian, Polish, Italian, and Portuguese are indicated. Multilingual support may also depend on the phone's system language.
7) What is the device's Bluetooth name?
BT-name: Battery Asst.
8) Does it save history?
Yes, it stores and displays history and can save test results.
9) Does it drain the battery when installed?
It is built for low power consumption, but the documentation states both 1 mA and 15 mA. How much it affects depends on the usage mode and connection.
10) Does it have protection against incorrect connection?
Yes, short-circuit protection and reverse connection protection are indicated as “Support”.
Notifications & safety
- Work carefully around batteries – avoid short circuits and sparks.
- The product is specified for 6–20V and is therefore intended for 6V/12V systems within this range.
- Functions and data may vary depending on battery type, temperature, vehicle, and app version.
- If you receive recurring warnings: check the battery's condition, terminals, ground, and charging system.
