12 volt 20 amp hour engine starting battery.
LiFePO4, Lithium iron phosphate.
 
SPECIFICATIONS
12V-20Ah
Voltage 12.8 V 
Nominal Capacity (C/5, 23°C)  20 Ah
Rated CCA 160 CCA
Comparable CCA 450 CCA
Weight Approx 5.0kg
Dimensions 197 x 130 x 198mm
Terminals JIS pencil post
Energy Density 104 Wh/l 
DC internal  resistance (max)     <1.5 mΩ 
Operating temperature -10°C to +50°C
Storage temperature -20°C to +45°C
Operating humidity 25% to 85%
Water/dust resistance IP56
Shock and vibration  IEC62133, DIN VG96  924
Certifications FCC Class B, CE, UL2054
Shipping Classification UN 3480, Class 9
Standard Discharge @ 23°C  Max. Cont. Current  10A
Max. 10 sec. Pulse  100A
Run-time @ 10A  120 min 
Run-time @ 30A  40 min
Standard Charge Charge Voltage 14.6 V 
Float Voltage   13.8 V 
Recommended charge current. 10A
Maximum charge current 20A
Charge Time from flat 3.5 hrs 
Expected life span, After discharging 80% of capacity 2000 cycles, 80% of capacity still remains.
This battery has cell balancing but no high or low voltage cutout.