3-in-1 Battery Care: Charger, tester, and organizer in one compact system. Stores up to 12 AA + 12 AAA rechargeable batteries, keeping power ready for homes, offices, schools, and institutions. Broad Compatibility, Polarity-Free: Supports any brand of AA and AAA Ni-MH batteries, plus our Ecolast 1.5V AA rechargeable Li-ion batteries. Drop cells in any direction¡ªno (+)/(-) alignment needed. Auto-Detect, Charge & Sort: Leading-edge per-cell management system checks each battery before charging. Only healthy batteries charge, while incompatible or unhealthy cells are automatically removed. Saves time and prevents mix-ups. Real-Time Per-Cell Insights: Instantly view each battery's type, charge level, and charging duration on the large 2.8-inch touchscreen (Pro version only) or via the Olight app (both models). Ecolast 1.5V Li-ion cells also provide ID, recharge cycles, and health percentage. Intelligent Thermo-Adaptive Charging: Adjusts charging current based on battery temperature¡ªfaster when cool, slower when hot¡ªprotecting your batteries while keeping charging efficient. Fast Charging with 5-Layer Protection: Safeguards against overcharge, overcurrent, overheating, overvoltage, and short circuits. Fully charges batteries in as little as 2.5 hours. The Pro version also includes two built-in MCC magnetic charging ports for Olight flashlights. * For the best user experience, please update your device firmware through the Olight App to ensure you are using the latest software version VX.0.29.