2005-2011 Honda FourTrax Foreman TRX500 FE/FPE/FM/FPM/TM Service Manual, Page 406Get this manual
Quality of the image is intentionally reduced!
BATIERYCHARGING SYSTEM
Remove the seat (page 3-4)
Measure the battery voltage using commercially
available digital multi meterVOLTAGE Fully charged: 13.013.2 Under charged: Be