ANCEL BT521 12V Lead-Acid Battery Tester & Charger, 5A Smart Maintainer

[TEST BEFORE YOU REPLACE — Know Your Battery] Don’t replace a battery based on a simple voltage reading. BT521 checks battery health, state of charge (SOC), state of health (SOH), internal resistance, rated and actual CCA, plus starting and charging system performance, helping you decide whether to charge, maintain or replace your 12V lead-acid battery
[DON’T JUST CHARGE — Care For Your Battery] A battery that charges isn’t necessarily a healthy battery. The automatic 8-step process moves through Desulphation, Soft Start, Bulk, Absorption, Analyse, Repair, Float and Pulse, to support charging, maintenance and recovery of compatible batteries
[CHARGE YOUR WAY — 1A / 3A / 5A] Choose the charging current that fits your battery and situation. Use 1A for lower-current charging and maintenance, 3A for everyday charging, or 5A when you need more charging power. Fast and Standard Charging modes give you flexibility when time or battery care matters most
[KEEP IT READY — Unattended Maintenance] Vehicles that sit unused can lose battery charge over time. Unattended Mode automatically manages long-term charging and maintenance, using Float and Pulse maintenance to help keep your battery ready for the next drive. Ideal for stored cars, RVs, motorcycles, boats and seasonal vehicles
[CHARGE WITH CONFIDENCE — Smart Protection] Charging conditions can change with temperature and battery condition. BT521 uses temperature compensation and automatic power reduction during high-temperature operation, along with reverse-polarity, overcharge, overvoltage, overcurrent and overheat protection. IP65-rated protection adds resistance to dust and water spray. Compatible with 12V Flooded, EFB, AGM and GEL batteries; not for 6V or lithium batteries