Extremely safe and stable chemistry: PCB and/or BMS built inside to balance protect the battery.
Long life-cycle: Can be circularly used, best can up to 2000 times recycles, 8 times of Lead acid battery.
Lighter weight, with the best power-to-weight ratio: 1/3 of Lead acid battery weight.
Good performance at high temperature and high temperature resistance
Low self-discharge rate, less than 3% monthly.
No memory effects and highly efficient charge.
Environment friendly: Clean and Green energy poses no pollution on our environment.

2. Deep cycle lithium battery 48V 25Ah Specification

NO.	Items		Characteristics	Testing Methods
1	Nominal Voltage		51.2V	Follow GB/T18287-2013>
2	Nominal Capacity		25Ah	Follow
3	Minimum Capacity		23.75Ah	Follow
4	Battery internal Impedance		Internal Impedance≤80mΩ	Internal Impedance Testing Machine(1kHz )
5	Shipment Voltage		51.2～54.4V	Multi-meter
6	Dimension	Length	318(±2)165(±2)215(±2)mm	Vernier caliper
		Width
		Height
		Gross weight	12.2±0.8 kg	electronic scale
7	Working Temperature	Charge	0~45℃,45~85%RH	Temperature & Humidity Instruments
7	Working Temperature	Discharge	-20~55℃,45~85%RH	Temperature & Humidity Instruments
8	Storage Temperature & Humidity Range	Short: above one month	-20~+55℃,45~85%RH	Temperature & Humidity Instruments
		Medium: above three months	0~+45℃,45~85%RH
		Long:above one year	+5~+30℃,45~85%RH
9	Allowed maximum continuous charge current		15A
10	Allowed maximum continuous discharge current		50A	Pulse current 115A/3S；
11	Allowed maximum reverse charge voltage		Not Allowed	/
12	Allowed maximum charge voltage		58.4±0.3V	Multi-meter
13	Discharge cut-off voltage		37~45V	Multi-meter
14	Pack series connection function		None

3. Deep cycle lithium battery 48V 25Ah Safety Test

No.	Items	Standards	Testing Methods
1	Internal Impedance	Impedance ≤80mΩ	Under 20±5℃ Environment Temperature , the Usage Frequency of Fully Charge( 1KHz) , Use AC Internal Impedance test machine to test
2	Nominal Capacity	25Ah	Rest for 0.5~1 hour after fully charge, Using electrical loader to connect with the battery output port, and discharge with constant current 0.2C till it can’t discharge. Do the cycle three times, if there is one time that the discharge time is equal or more than 285minute, you can stop.
3	Short circuit protection	NONE	Prohibit output electrode short circuit
4	Allowed Maximum continuous charge Current	15A	charging with this current for more than 0.5h and the added temperature of battery pack less than 20℃.
5	Allowed Maximum continuous discharge Current	50A	Discharging with this current for more than 0.5h and the added temperature of battery pack less than 20℃.
6	Over Current Protection	115~145A	Using electron load connect with output side, discharge with 115A for about 3sec Discharge with 145A for less than 40 millisecond,

3. Deep cycle lithium battery 48V 25Ah Dimension

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