12V BCI Group 48 AGM Powercell Battery.
Can be used as a reserve and/or starting battery.

Specs:
Voltage : 12V
Wattage: 2000W / 3300W
MAX Amps: 3000
CA: 950A
Ah: 74
RC: 132min
 
Dimensions:
Weight Lbs.: 48.22 lbs
Weight Kgs.: 21.87 kgs
Length: 10.94 in
Height: 7.48 in
Width: 6.93 in
 
M6 Terminal Hardware Included.