The ANCEL BT521 is a reliable helper for testing, charging, and maintaining 12V car batteries. Advanced tests reveal the true state of charge, cranking performance, and overall battery condition, including alternator and load tests. Smart charging with temperature compensation automatically adjusts voltage and current to prevent overcharging in heat and undercharging in freezing conditions.

Thanks to its IP65 rating, comprehensive protections (reverse polarity, short circuit, overvoltage, overheating, overload), and intuitive controls with a bright LCD display, operation is as safe as it is convenient. The Fn Quick Start function enables rapid access to the most common tests and charging modes, saving time in the shop and on the road.

• Versatile tests: state of charge, SOH/CCA, load test, alternator test
• 8-stage charging: standard, fast, maintenance/float, regeneration/repair
• Wide compatibility: 12V WET, MF, Ca/Ca, AGM, GEL
• Safe operation: IP65, protection against reverse polarity, short circuit, overvoltage, and overheating
• Clear controls: bright LCD display and quick Fn access