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Features: * It can automatically identify Lithium-Ion (Li-Ion 3.7V) batteries and Ni-MH batteries, and manually select the iron phosphate (UFeP04) battery and Li-Ion 3.80V battery (IMR). * Multiple safety protection functions such as overcharge, over discharge, short circuit, and reverse connection protection can automatically and automatically identify bad batteries. * AC110-240V (50/60Hz) input (standard built-in power supply), four-slot independent charging and microcomputer management system. * Charging current is intelligent automatic selection, there are 3 levels (500mA/1000mA/2000mA) for you to choose from, 2000mA is designated as the fourth slot. * LED charging indicator can display the charging status: 25%, 50%, 75%, 100%, also can display battery type: NiMH 1.2V, Li-Fe 3.2V, Li-ion 3.7V, Li-ion 3.80V (IMR).

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charge with constant current 1C to 4.2V, then charge with constant voltage 4.2V till charge current is less than 0.01C