not the lowest but still a good price for a 12V Batteries tester.
TOPDON BT100 automotive battery tester works on all automotive 12 Volt batteries of 100 to 2000 CCA, such as regular flooded, AGM flat plate, AGM spiral, GEL, and deep cycle batteries for vehicles, SUVs, motorcycles, light trucks, boats, and more. Based on battery rating standards - CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, and GB.
it's an upgrade version of TOPDON BT50 with better quality and accuracy (according to the seller)
Got it for $20 from ebay sales. Yet to use