Here is a Simple LED Volt meter to Monitor the charge level in Lead Acid Battery or Tubular battery. The terminal voltage of the battery is indicated through a four level LED indicators. The nominal ...

Ryobi 4V USB Lithium batteries are really convenient and easy to recharge and have a really easy way to see if they are fully ...

A comment in response to our coverage of the Blackmagic Video Assist complained that the battery level meter could be inaccurate. And yes, the poster has a point, but the reason this problem wasn't ...