The John Deere 6120 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 6120 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 6120 Battery FAQ
Replacement battery recommendation
The best replacement battery for a John Deere 6120 tractor is a 629 Type, 12V Wet Battery with 180AH capacity. This battery is specifically designed to fit and perform well in that model
Battery voltage
The official battery voltage for the John Deere 6120 tractor is 12 volts
Battery group size
The official battery group size for the John Deere 6120 tractor is Group 31
Battery CCA
The recommended official John Deere 6120 tractor battery has a Cold Cranking Amps (CCA) rating of 750. This ensures reliable starting power in cold conditions
Battery location
The battery on the John Deere 6120 tractor is located underneath the right access step. You may need to open the flap and possibly remove the access step to access it
Battery replacement steps
To replace the battery on a John Deere 6120 tractor, first, locate the battery underneath the right access step and open the flap. If necessary, remove the access step by taking out the attaching screws, and ensure to disconnect any light connectors if the tractor has step lighting before proceeding
Bad battery symptoms
Battery will not charge, slow cranking, and loose or corroded connections are common symptoms for a John Deere 6120 tractor’s bad battery
Official information note
Mistakes do happen. Please check official deere.com website for official information.
