The John Deere 8400T 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 8400T 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 8400T Battery FAQ
Battery voltage
The John Deere 8400T tractor uses a 12-volt battery system
Battery group size
The official battery group size for the John Deere 8400T tractor is BCI Group Size 31. This size is designed to provide the necessary power and fit for the tractor’s specifications
Battery location
The battery on the John Deere 8400T tractor is located on the left side beside the steps. To access it, you need to pull outward on the cover and lift it off
Battery replacement steps
The battery on a John Deere 8400T tractor is located underneath the right access step; open the flap and remove the step if necessary to access it
Bad battery symptoms
Common symptoms of a bad battery in a John Deere 8400T tractor include hard starting or no response when trying to start, clicking sounds, and rapid battery drain. Additionally, corrosion on battery terminals can prevent proper electrical flow, leading to starting issues
Official information note
Mistakes do happen. Please check official deere.com website for official information.
