The John Deere 5120M battery size is listed as 12 V.
Voltage12 V
John Deere 5120M Battery Specs
Battery voltage
12 V
Battery Spec Comparisons Chart
Voltage comparison
This model
12 V
Average
11.94 V
Low
6 V
High
12 V
John Deere 5120M Battery FAQ
Replacement battery recommendation
The best replacement battery for the John Deere 5120M tractor is typically a Strongbox battery, known for its durability and longevity. You may also consider a Group 31 truck battery, which can fit and provide adequate cold cranking amps (CCA) with some minor modifications
Battery voltage
The John Deere 5120M tractor uses a 12-volt battery system
Battery CCA
John Deere 5120M tractors use Group 24 or Group 27 batteries with a recommended cold cranking amps (CCA) of around 750–900
Battery location
The battery on the John Deere 5120M tractor is located in front of the radiator
Bad battery symptoms
Common symptoms of a bad battery in a John Deere 5120M tractor include hard starting or no response when trying to start, rapid battery drain, and visible corrosion on battery terminals. If the battery voltage is low or the tractor shows signs of electrical issues, it may need to be serviced or replaced
Official information note
Mistakes do happen. Please check official deere.com website for official information.
