Description
3-IN-1 DEVICE YOU NEED: If you’ve ever dealt with a dead car battery, you know how frustrating it can be. Whether it’s sudden power loss, expensive replacements, or batteries dying too soon, we’ve got the solution. BT521 combines a battery charger, battery tester and battery maintainer all in one, helping you keep your battery healthy, prevent unexpected breakdowns, and extend its lifespan—all while saving money on replacements
Smart Charging: Supports both fast and standard charging to suit different needs. Delivers a stable 4.3A-5A current with low ripple and minimal heat, reducing battery wear and ensuring safe, long-term use. The 8-stage charging process precisely manages charging with phases like diagnosis, repair, constant current, constant voltage, and float charging, enhancing efficiency and effectively restoring depleted or sulfated batteries, ultimately extending battery life
MAINTENANCE MODE: Keeps your battery in peak condition with an intelligent trickle charge that prevents overcharging, self-discharge and sulfation. This mode can extend battery life by up to 50%, reduce the frequency of replacements, and lower long-term maintenance costs. It’s ideal for vehicles in storage or seasonal use, ensuring they’re always ready to go. (Pro Tip: Charging battery once a year can significantly improve its performance and longevity)
MEET THE BM300 Pro – Similar to the BM300, offers wider applications. Enhancements include 24V power, upgraded Bluetooth 4.0 to 5.3, extended data storage from 30 to 72 days, IP67 waterproofing, customizable batteries, ability to monitor 4 batteries simultaneously
KEY FEATURES – BM300 Pro monitors battery health, including voltage, cranking & charging system and driving records. It monitors abnormal battery conditions and takes appropriate measures to protect the battery. With 72 days of data storage, you can compare changes before and after taking measures, giving you a better understanding of your battery's status
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