Do you have the same problem？

• The battery is fully charged, but after using it for a short time, it will notify you that it is time to charge

• The battery charging speed has slowed down

• Is the second-hand car battery I bought as good as the dealer said?

• I want to drive a car that has been in the garage for a long time, do I need to charge it?

Stop guessing!

BM310 battery tester maybe fix those problems.Just 3 seconds.It is so cool and easy to know your battery status.

It's small and convenient, and it doesn't take up any space in your toolbox or in the car. Plug and play, easy to use. Quick response, indicator light display, easy to understand

Note:

1.Don’t use for too long

2.When car is energized and not started,it detects the voltage of the battery. If the voltage value is lower than 10V (OK led flashing), it is hard to start; if it is lower than 11.6v (low led flashing), please turn off the electrical appliances on the car and start alternator to charge immediately

3.When the car starts, it detects the voltage of alternator.Lower than 13.5v (good led flashing), it can’t charge the battery. You need to check the alternator or turn off some car electrical appliances. Above 14v (fault light flashing or on), check the engine.