Li-Ion Battery Pack 18650 2900mah Battery Pack With High Quality

Item		Rating	Note
Cell	Type	Li-ion Battery
	Cell Model	18650-2900mAh
	Nominal Capacity	2900mAh	Discharge : 0.2C Cut-off Voltage: 2.5V
	Minimum Capacity	2750mAh	Discharge : 0.2C Cut-off Voltage: 2.5V
	Nominal voltage	3.7V
	Internal Impedance	≤60mΩ
	Dimension	Max. 18.5*65mm
	Weight	Approx.50g
Battery Pack	Pack Method	4S9P
	Nominal Capacity	26.1Ah	Discharge : 0.2C Cut-off Voltage:10V
	Minimum Capacity	24.3Ah	Discharge : 0.2C Cut-off Voltage: 10V
	Nominal Voltage	14.4V
	Charge Voltage	16.8V
	Discharge cut-off voltage	10V
	Charge Method	CC/CV
	Standard Charge Current	0.16A	0.2C
	Max. Charge Current	10A
	Standard Discharge Current	5.22A	0.2C
	Max. Continues Discharge current	10A
	Cycle Life	300 times(week)	80%
	Internal Impedance	200mΩ
	Dimension	L168* W78*T73mm	MAX
	Weight	Approx.1.8kg
	Working Temperature Range	Charge: -20°C–50°C Discharge: -20°C–50°C
	Storage Temperature	-10°C–45°C

Development of the battery began in 2012, when Chiang joined the Department of Energy’s Joint Center for Energy Storage Research, a five-year project that brought together about 180 researchers to collaborate on energy-saving technologies. Chiang, for his part, focused on developing an efficient battery that could reduce the cost of grid-scale energy storage.

A major issue with batteries over the past several decades, Chiang says, has been a focus on synthesizing materials that offer greater energy density but are very expensive. The most widely used materials in lithium-ion batteries for cellphones, for instance, have a cost of about $100 for each kilowatt hour of energy stored.

“This meant maybe we weren’t focusing on the right thing, with an ever-increasing chemical cost in pursuit of high energy-density,” Chiang says. He brought the issue to other MIT researchers. “We said, ‘If we want energy storage at the terawatt scale, we have to use truly abundant materials.’”