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Universal Battery Charger for Rechargeable Li-ion Batteries Functions: 1 The state of the LED display charger, USB cable to connect the adapter green (for electricity), into the battery shows red charging status, charger once again shows that green battery charging has been finished. 2 Use MIRCRO USB DC 5V input, and two 3.6/3.7v lithium battery charger 3 Have overcharge, overdischarge, short circuit, anti-connect battery detection and protection function 4 There is a USB output function on the other side of this product: the standard 5V1000MA can be used as a mobile emergency charger 5 Compatible battery: 26650 226350 20700 21700 18650 16317,650 17,650 16650 10440 14500 18350 18500 (li-ion) Specifications: 1 Input power: MICRO DC 5V 2A 2 Output voltage: 4.2V 3 Output current: 1000MA*2 4 Constant current constant pressure, cut-off current