Скачать или смотреть BX100 Lipo battery voltage tester with low voltage buzzer AliExpress

The BX100 is a dirt cheap lithium battery DC voltage 1S - 8S tester / checker.
For use on:
Lithium polymer LIPO
Lithium ion manganese oxide LIMN
lithium iron phosphate battery LIFE

Simply plug the battery balance lead into the tester to see:
How many cells
Total voltage all cells
Individual voltage each cell

There is also a low voltage alarm function. Alarm rings when any cell drops below your desired low voltage setting, either when resting or under load.

You can test your battery before playing, or during, or you can leave it in the vehicle/craft so you can monitor voltages.

There is one button on top to set the low voltage value for the alarm.
Off
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8

For a few dollars on AliExpress it’s good to keep one with the battery box or charger.
If you have a car that doesn’t have LVC this is perfect. Then you can listen for the super loud alarm.