2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 412Get this manual
BATTERYCHARGING SYSTEM Set the temperature switch to "HIGH" or "LOW" depending on the ambient temperature
HIGH: 15C (60F) or higher LOW: 15C (60F) or lower
For the first check, DO NOT charge the battery before testing; test it in an "as is" condition
Push in the appropriate test button for seconds and read the condition of the battery on the meterTEST BUTTON