Specification:
1. Rated Capacity: 15Ah: Standard discharge(2A) after standard charge
2. Minimal Rated Capacity: 14Ah: Standard discharge(2A) after standard charge
3. Nominal Voltage: 48V: Mean Operation Voltage
4. Cycle Life: Higher than 70% of the Initial Capacities of the Cells: Carry out 500cycle
Standard discharge(2A) after standard charge
Discharge: 2Ah to 39V
Rest Time between charge/discharge: 30min.
Temperature: 20± 5C
5. Voltage at end of Discharge: 39V: Discharge Cut-off Voltage
6. Charging Voltage: 54.6V:
7. Standard charge: 2A CC(constant current)charge to 54.6V, then CV(constant voltage 54.6V)charge till charge current decline to ≤ 0.01C: Charge time: Approx 6h
8. Standard discharge: Constant current 2A; End voltage 39V:
9. Maximum Continuous Charge Current: 1C(15A):
10. Maximum Continuous Discharge Current: 2C(30A):
11. Operation Temperature Range: Charge: 0~45C, 60± 25%R. H.
Bare Cell Discharge: -10~60C,
12. Storage Temperature Range: Less than 1 year: -20~25C, 60± 25%R. H. At the shipment state, Less than 3 months: -20~40C,
13. Weight: Approx: 6.5Kg:
14. Pack Dimension: High: 389mm, Width: 76mm, Long: 110mm:

Performance And Test Conditions
1. Standard Test Conditions
Test should be conducted with new batteries within one week after shipment from our factory and the cells shall not be cycled more than five times before the test. Unless otherwise specified, test and measurement shall be done under temperature of 20± 5C and relative humidity of 45~85%. If it is judged that the test results are not affected by such conditions, the tests may be conducted at temperature 15~30C and humidity 25~85%RH.

2. Measuring Instrument or Apparatus
2.1 Dimension Measuring Instrument
The dimension measurement shall be implemented by instruments with equal or more precision scale of 0.01mm.
2.2 Voltmeter
Standard class specified in the national standard or more sensitive class having inner impedance more than 10kΩ /V
2.3 Ammeter
Standard class specified in the national standard or more sensitive class. Total external resistance including ammeter and wire is less than 0.01Ω .
2.4 Impedance Meter
Impedance shall be measured by a sinusoidal alternating current method (1kHz LCR meter).

3. Standard ChargeDischarge
3.1 Standard Charge: 2A
Charging shall consist of charging at a 2A constant current rate until the cell reaches 29.4V. The cell shall then be charged at constant voltage of 42 volts while tapering the charge current. Charging shall be terminated when the charging current has tapered to 0.01C. Charge time: Approx 4.5h, The cell shall demonstrate no permanent degradation when charged between 0 and 45C.
3.2 Standard Discharge: 2A
Cells shall be discharged at a constant current of 2A to 21Volts @ 20Degree, 5C
3.3 If no otherwise specified, the rest time between Chare and Discharge amount to 30min.