Barra Battery Voltage Alarm

Works well. Keeps you safe. Good battery maintenance

Works as advertised highly recommended‼️ You don’t wanna be caught with a low battery you need one of these

Works like it should helps keep battery in good condition

Voltage battery alarm is easy to use fits very easily with the battery i have tested it with rc car's will let you know if the battery is low

This thing works well, just very difficult to read to extremely small print on the back of device. A printout of the instructions in regular size fonts would be so helpful to those with less than perfect eyes. The device will sound alarm when it reaches the critical voltage that was set by User, now it's a rather loud alarm. Well, it went off at 3am and scared the old lady as she thought the something was happening, unbeknown to her was the battery alarm in the 400E, just went off as battery drains even when gun is powered down. So, don't leave battery alarm in gun at night, as it may go off.

I don't know how to rate it because i don't know how to use it , the instructions are NOT clear , do you install it in the gun , or just when your charging it , I don't know what the black buttons are for , or when to use them , Its sitting on my desk & i don't have a clue. what to do with it . It may be simple to you , but i give it a O

Works good and worth having , best get you one while they have'em

The voltage alarm is very good and loud also inexpensive battery voltage alarm is easy to use and a must have to get good battery life. It also shows the current state of charge of each battery cell.

Although not required this device is exceedingly handy in keeping a status on your power and ensuring you inadvertently damage the power supply by dropping the voltage too low.

Very helpful to have, making me keenly aware of the status of my batteries.