The John Deere 4840 battery size is listed as Group 31, 12 V, 925 CCA, 13 × 6.81 × 9.44 in.
Battery sizeGroup 31
Voltage12 V
CCA925 CCA
Case size13 × 6.81 × 9.44 in
John Deere 4840 Battery Specs
Battery size / group
Group 31
Battery voltage
12 V
Battery CCA
925 CCA
Battery dimensions
13 × 6.81 × 9.44 in
Battery Spec Comparisons Chart
CCA comparison
This model
925 CCA
Average
839.52 CCA
Low
150 CCA
High
1850 CCA
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 4840 Battery FAQ
Replacement battery recommendation
The best replacement batteries for a John Deere 4840 tractor are two group 31 12-volt batteries, which provide reliable starting power. Alternatively, a single high-capacity 12-volt battery can also be used if cold weather starting is not a concern
Battery voltage
The official battery voltage for the John Deere 4840 tractor is 12 volts
Battery group size
The official John Deere 4840 tractor uses two Group 31 12-volt batteries wired in parallel for reliable starting
Battery CCA
The recommended battery for the John Deere 4840 tractor is typically two group 31 12-volt batteries with a high Cold Cranking Amps (CCA) rating, ideally around 925 CCA for reliable starting performance
Battery location
The battery on the John Deere 4840 tractor is located underneath the right access step. You may need to open the flap and possibly remove the access step to access the battery
Battery replacement steps
To replace the battery on a John Deere 4840 tractor, first disconnect the negative cable, then the positive cable, and remove the battery hold-down bracket. After installing the new battery, connect the positive cable first, followed by the negative cable. Wikipedia
Bad battery symptoms
Common symptoms of a bad battery in a John Deere 4840 tractor include slow cranking of the engine, failure to start, and low battery voltage indicators. It’s important to check the electrolyte level and specific gravity of the battery to confirm its condition
Official information note
Mistakes do happen. Please check official deere.com website for official information.
