2-bay Universal Cylindrical Li-ion Battery charger for 18650,16340,21700,etc. Features: 【Widely Compatible】-Universal for cylindrical Li-ion batteries: 18650, 21700,26650, 22650, 18490, 16340 (RCR123), 14500, 10440 etc. 【Special designed battery clamping structure】-Easy and Safe to load and unload battery 【Intelligent Control & Safety Guarantee】- Advanced MCU control, with low heating loss, over-heat and over-current protection, short-circuit protection 【USB Charger】-With mirco-USB and Type-C input, the battery charger powered by 5V-1A ~ 5v-2.4A USB input, easy to connect with cell phone charger adapter, power bank USB port, car charger adapter. 【Package Including】-1x Battery Charger; 1x Usb cable Universal Cylindrical Li-ion Battery charger Main Spec: Input DC5V-2.1A, 5V-1A , micro USB or Type-C pluginOutput: DC.2V-800mA x2 (max), 8W (max)Allow a single battery or 2 batteries in same size charging at a timeLED light: LED is red when in charging, blue when charging finish or unloadSize: 103mm* 5mm* 31mm (L*W*H) Working Conditions Keep in dry and dustless placeCharging Temperature Range: 0℃-5℃ (32℉- 113℉) Danger and Cautions Not suitable for charge LiFePO(LFP) rechargeable batteryNot suitable for charge NiMH rechargeable batterymay result in over-charging of LiFePO(LFP) and NiMH batteryAvoid reverse connection of batteryStop charging if the battery gives off odor, looks deformed, or in any wayappear abnormal ,immediately remove it from the chargerTake the batteries out from charger when charging completedKeep the charger and battery away from heat source such as fire or heaterwet ,dusty places, at least 1 meter away from combustible materialsDo not use power from laptop computer USB port rated lower than 5v-1ADisassembling the charger may cause damage and void the warrantyKeep the charger out of the reach of little children Certification: CE, FCC certificated, pass UL 0335 tests