The John Deere 4120 battery size is listed as 12 V.
Voltage12 V
John Deere 4120 Battery Specs
Battery voltage
12 V
Battery Spec Comparisons Chart
Voltage comparison
This model
12 V
Average
11.54 V
Low
6 V
High
24 V
John Deere 4120 Battery FAQ
Replacement battery recommendation
The best replacement battery for a John Deere 4120 tractor is typically a John Deere StrongBox battery, known for its durability and reliability. Other popular options include Interstate and Optima batteries, which have received positive feedback from users for their performance
Battery voltage
The official battery voltage for the John Deere 4120 tractor is 12 volts
Battery group size
The John Deere 4120 tractor uses a 12-volt battery with a Cold Cranking Amps (CCA) rating of 770
Battery CCA
The recommended battery for the John Deere 4120 tractor has a Cold Cranking Amps (CCA) rating of 770
Battery location
The battery on the John Deere 4120 tractor is located in the battery box on the right side of the tractor. To access it, you will need to remove the battery box cover
Battery replacement steps
To replace the battery on a John Deere 4120 tractor, first, access the battery by opening the flap and removing the access step if necessary. Then, disconnect the battery terminals, remove the old battery, and install the new one, ensuring to reconnect the terminals properly. Wikipedia
Bad battery symptoms
A weak or failing battery on a John Deere 4120 tractor often shows symptoms like slow cranking, difficulty starting, or the voltage indicator displaying when the key is on and engine is off
Official information note
Mistakes do happen. Please check official deere.com website for official information.
