The TOPDON BT100W is a compact wireless battery tester that provides accurate diagnostics for 12V lead-acid batteries. Designed for everyday drivers and DIYers, it connects via Bluetooth to the TOPDON app on your smartphone, delivering real-time battery health, cranking, and charging system diagnostics. With support for flooded, AGM, and GEL batteries, it's ideal for quick, safe in-vehicle testing at home, in the garage, or on the road.

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