The John Deere M665 battery size is listed as 12 V.
Voltage12 V
John Deere M665 Battery Specs
Battery voltage
12 V
Battery Spec Comparisons Chart
Voltage comparison
This model
12 V
Average
11.66 V
Low
6 V
High
24 V
John Deere M665 Battery FAQ
Replacement battery recommendation
The best replacement battery for a John Deere M665 tractor is a John Deere Performance Battery or the heavy-duty StrongBox line, which are designed to meet the demanding specifications of your equipment. These batteries are built for durability and reliability in various conditions
Battery voltage
The official battery voltage for the John Deere M665 tractor is 12 volts DC
Battery group size
The official battery group size for the John Deere M665 tractor is Group U1
Battery CCA
The recommended official battery for the John Deere M665 tractor has a Cold Cranking Amps (CCA) rating of 480
Battery location
The battery on the John Deere M665 tractor is located underneath the right access step
Battery replacement steps
To replace the battery on a John Deere M665 tractor, first disconnect the negative (-) cable, then the positive (+) cable, and remove the battery hold down. After that, lift the battery out and install the new one by reversing these steps
Bad battery symptoms
Common symptoms of a bad battery in a John Deere M665 tractor include hard starting or no response when trying to start, rapid battery drain, and visible corrosion on battery terminals. If the battery holds 11.5V or less, it likely needs replacement
Official information note
Mistakes do happen. Please check official deere.com website for official information.
