Not merely a battery indicator:
The battery capacity meter is applied to indicate the battery voltage, also helpful to remind you of low voltage with a loud alarm, effective protect your battery from overcharging or over discharging.

Widely Applicable:
The battery tester is suitable for 1s-8s battery to test the working state of the battery, and automatically protect against reverse connection.

Specification:
Voltage detection precision: within 0.01 V.
Voltage display range: 0.5~4.5 V
Total voltage display range: 0.5~36 V
1S test mode voltage range: 3.7~30 V
Low voltage alarm mode: 2-8 S
Alarm set value range: OFF~2.7~3.8 V

Package includes:
10 x Battery capacity testers

Warm note:
When the voltage is lower than the alarm value, it will always ring. When the measured battery is unplugged, the alarm will stop.