21700 电芯-锂电池电芯、电池组和充电器供应商

产品描述

Parameter	Specification
Model	21700 Li-ion Cell
Nominal Voltage	3.6V / 3.7V
Rated Capacity	4000–5000mAh
Charging Voltage	4.2V
Maximum Continuous Discharge Current	5A–20A (depending on type)
Peak Discharge Current	Up to 30A
Cycle Life	≥500 cycles
Internal Resistance	≤50 mΩ
Dimensions (Diameter × Length)	21mm × 70mm
Weight	~68–70g
Operating Temperature	-20°C to 60°C
Storage Temperature	0°C to 35°C (recommended)
Safety Features	Overcharge, over-discharge, short circuit protection
Chemistry	Lithium-ion (Li-ion)
Applications	EVs, eBikes, power tools, energy storage, portable electronics