The John Deere 3640 battery size is listed as 12 V.
Voltage12 V
John Deere 3640 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 3640 Battery FAQ
Replacement battery recommendation
John Deere offers standard-duty Performance Batteries and heavy-duty StrongBox batteries designed for demanding equipment use
Battery voltage
The official battery voltage for the John Deere 3640 tractor is 12 volts
Battery group size
The official battery group size for the John Deere 3640 tractor is two 12-volt batteries. The specific BCI group size is not mentioned, but it typically uses standard sizes compatible with its specifications
Battery CCA
The official John Deere 3640 tractor battery has a recommended cold cranking amps (CCA) of 720
Battery location
The battery on the John Deere 3640 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 3640 tractor, first disconnect the negative (-) battery cable, then the positive (+) cable. After removing the battery hold down, lift the battery out and install the new one by connecting the positive cable first, followed by the negative cable
Bad battery symptoms
A weak or dead battery in a John Deere 3640 tractor often causes hard starting, a clicking sound when turning the key, or no response when trying to start the engine. Low battery voltage (below 12 volts) or visible corrosion on terminals can also indicate a failing battery
Official information note
Mistakes do happen. Please check official deere.com website for official information.
