The 1S-8S Lithium Battery Capacity Indicator Module is an ultra-compact, universal fuel gauge designed to monitor voltage levels in multi-cell battery packs. Featuring a clear, backlit display layout with a 4-segment battery icon, it provides an instant visual metric of remaining power (25%, 50%, 75%, 100%). The board supports a wide voltage spectrum and can be manually configured via rear solder jumpers to accurately match 1S through 8S battery strings (3.7V to 33.6V). Complete with an onboard tactile toggle switch (SW1) to activate the display on demand, this highly versatile tester board is the perfect addition to custom power banks, electric vehicles, and DIY 18650 battery banks.

Would you like a detailed long description or instructions on how to configure the rear solder pads to select your specific battery configuration (1S to 8S)?