The John Deere 8400 battery size is listed as Group 31, 12 V, 13 × 6.81 × 9.44 in.
Battery sizeGroup 31
Voltage12 V
Case size13 × 6.81 × 9.44 in
John Deere 8400 Battery Specs
Battery size / group
Group 31
Battery voltage
12 V
Battery dimensions
13 × 6.81 × 9.44 in
Battery Spec Comparisons Chart
Voltage comparison
This model
12 V
Average
11.54 V
Low
6 V
High
24 V
Case length comparison
This model
13 in
Average
11.3 in
Low
9.38 in
High
13 in
John Deere 8400 Battery FAQ
Replacement battery recommendation
John Deere StrongBox batteries are designed specifically for John Deere equipment and are recommended as replacements for the 8400 tractor
Battery voltage
The John Deere 8400 tractor uses a 12-volt battery system
Battery group size
The official battery group size for the John Deere 8400 tractor is BCI Group Size 31. This size is designed to provide the necessary power for the tractor’s diesel engine
Battery CCA
The recommended official John Deere 8400 tractor battery has a Cold Cranking Amps (CCA) rating of 925
Battery location
The battery on the John Deere 8400 tractor is located on the right side of the tractor in the battery box
Bad battery symptoms
Battery-related symptoms for a John Deere 8400 tractor include a voltage indicator displayed when battery voltage is low, slow cranking, and the starter not engaging due to loose or corroded connections or sulfated/worn-out batteries
Official information note
Mistakes do happen. Please check official deere.com website for official information.
