See some of E&J LiFePO4 battery packs:
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Specification:
Model: IFR14500
Nominal Voltage (V):3.2
Nominal Capacity (mAh):500
Type: Cylindrical LiFePO4 Batteries pack
Max Charge current(mA):500
Max discharge current(mA):1000
Size (mm):14.0*50
Weight(g): 18
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Specification:
Model: EJ1204.5Fe
Voltage(V):12(12.8)
Capacity(Ah):4.5
Type:Cylindrical LiFePO4 battery
Maximum Charge Current(A): 4.5
Continuous Discharge Current(A):7
Size(mm):114*39*68(L*W*H)
Weight(kg):0.6
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Specification:
Model: EJ1212Fe
Voltage(V):12(12.8)
Capacity(Ah):12
Type:Cylindrical LiFePO4 battery
Maximum Charge Current(A): 6
Continuous Discharge Current(A): 12
Size(mm): 151×98×95(L*W*H)
Weight(kg):1.3
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Specification:
Model: EJ12100Fe
Voltage(V):12(12.8)
Capacity(Ah):100
Type:LiFePO4 battery
Maximum Charge Current(A): 100
Continuous Discharge Current(A):100
Size(mm):390*170*310(L*W*H)
Weight(kg):22.0
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Specification:
Model: EJ12200Fe
Voltage(V):12(12.8)
Capacity(Ah):200
Type:LiFePO4 battery
Maximum Charge Current(A): 100
Continuous Discharge Current(A):100
Size(mm):430*290*310(L*W*H)
Weight(kg):35.0
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Specification:
Model: EJ12300Fe
Voltage(V):12(12.8)
Capacity(Ah):300
Type:LiFePO4 battery
Maximum Charge Current(A): 100
Continuous Discharge Current(A):100
Size(mm):550*250*360(L*W*H)
Weight(kg):50.0
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Specification:
Nominal Capacity(Ah):20Ah± 5%
Nominal Voltage(V):24V
Standard Charge Current(C):0.2
Max Charge Current(C):0.5
Charge cut-off Voltage(V):29.4±0.3
Standard Discharge Current:(C):0.5
Max Discharge Current(C):2
Discharge cut-off Voltage(V):19.2
Pack Voltage(V):25~28
Pack Impedance(mΩ) :< 80
Weight(kg):Approx:4.5
Dimension(mm):78×180×340mm
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