Shipping list: 14.8V 4.4 A battery pack 1 PCS, Built-in BMS + 16.8 V 1A Charger 1 PCS [product parameters] Model: 14.8V 4.4Ah Battery Type: Li-ion Battery Model : 18650 Single battery voltage: 3.7V Single battery capacity: 2200mAh Combination method: 4S 2P Combined capacity: 4400mAh Nominal voltage: 14.8V Output voltage: 12V~16.8V Charging voltage: 16.8V ± 0.2V Battery Power: 118W Maximum working current: 6A Maximum instantaneous current: 8A Charging working temperature: -10 ~ 45 ° C Discharge working temperature: -10 ~ 60 ° C Cycle times: 600times Weight: 600g Size: 75*70*38mm Internal BMS protection circuit: overload, over-discharge, over-current, short circuit protection. Scope of use: Widely used in various electronic products, including digital cameras, walkie-talkies, portable VCD/DVD, IC card terminals, PDA, electronic door locks, electric toys, emergency lighting, alarm systems, medical instruments, communication equipment, various instruments, etc. Features: 1. Lithium battery is light in weight, small in size, large in battery capacity, high in energy and high in safety. 2. Lithium battery pack battery raw materials. The battery core itself has over-charge, over-voltage, over-discharge and over-current safety protection. Fundamentally solved the hidden dangers of lithium battery short circuit, leakage, explosion and so on. 3. Charging chip protection board (using military-grade intelligent IC chip, with over-current, over-voltage, over-charge, over-discharge, under-voltage, short-circuit, reverse connection, balanced voltage and balanced charging, etc.) to ensure the battery pack Safe and reliable. 4. The lithium battery pack has a long use time, Lithium battery life 2-3 years.