Keeppower 21700 Protected Battery P2155C 3.6V 5500mAh Rechargeable with K1 1-Bay USB-C Battery Charger Combo Set

About the K1 charger:The Keeppower K1 Battery Charger is a versatile charger that can be used to charge a wide range of Li-ion and Ni-MH rechargeable batteries. It features a Type-C input port and an LED indicator to show the charging status. The charger has a current switch that allows you to select the charging current for different battery types. It is compatible with Li-ion batteries such as 26700, 26650, 26500, 21700, 18650, 18500, 18350, 17650, 17500, 16650, 16340, 14650, 14500, 14430 and Ni-MH batteries such as AA, AAA, A, SC, C, and F6. The charger has an input voltage of 5.0V and a current of 2.0A. The output voltage is 4.20V for Li-ion batteries and 1.48V for Ni-MH batteries. The output current can be adjusted to 0.5A, 1A, or 2A for Li-ion batteries and 0.5A for Ni-MH batteries. Built-in high-precision MCU and real-time temperature control protection system, with over-current protection, over-charge, over-voltage, and short-circuit protection. The charger will automatically stop charging after fully charged batteries. About the 21700 battery P2155C: MODEL: P2155C BATTERY CAPACITY: Nom. 5500mAh discharge at 0.2C; Min. 5400mAh discharge at 0.2C NOMINAL VOLTAGE: 3.6V OVER CHARGE PROTECTION VOLTAGE: 4.2V OVER DISCHARGE PROTECTION VOLTAGE: 2.5V OVER CURRENT PROTECTION CURRENT: Above 30A SHORT CIRCUIT PROTECTION DELAY TIME: 280±84us STANDARD CHARGE CURRENT: 1100mA STANDARD DISCHARGE CURRENT: 1100mA MAXIMUM CONTINUOUS DISCHARGE CURRENT: 11A MAXIMUM SIZE: 22.2(D)X75(H)mm NTERNAL RESISTANCE: ≤ 40mΩ MAXIMUM WEIGHT: 73g OPERATION TEMPERATURE: 0℃~+45℃ CHARGE; -20℃~+60℃ DISCHARGE STORAGE TEMPERATURE: -20℃~+60℃ Less than 1 month; -20℃~+45℃ Less than 3 month

• The K1 charger is compatible with Li-ion Rechargeable Batteries: 26700/26650/26500/21700/18650/18500/18350/17650/17500/16650/16340/14650/14500/14430. Also compatible with Ni-MH Rechargeable Batteries: AA/AAA/A/SC/C/F6.
• The input for K1 charger is 5.0V—2.0A. The output for this charger is 4.20V—0.5A/1A/2A for Li-ion Rechargeable batteries and 1.48V—0.5A for Ni-MH Rechargeable batteries.
• The K1 charger has a type C mount for charging, an LED indicator for tracking charging status and has a current switch to adjust the current. It can be charged by a USB power adapter, laptop, power bank, etc.. It is so portable that you can use it at home or on travel.
• Keeppower P2155C battery is a high capacity (5500mAh) lithium ion protected battery, built in with an original 21700 cell made in Japan, and also with the protection circuit to protect the battery from over-charge, over-discharge, over-current, leakage and short circuit. It comes with the UN38.3, CE, ROHS, MSDS, Regulation (EU) 2023/1542 certifications which guarantee the safety of daily usage, storage and transportation.