12V BCI Group 24 AGM Powercell Battery.

Specs:
Voltage : 12V
Wattage: 2500W / 4000W
MAX Amps: 3,500
CA: 1200A
Ah: 96
RC: 186min

Dimensions:
Weight Lbs.: 59.52 lbs
Weight Kgs.: 27 kgs
Length: 10.24 in
Height: 8.31 in
Width: 6.65 in

M6 Terminal Hardware Included.