E-Z-GO 2FIVE 4 PASSENGER - Manual (Page 106)

Read all of this manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notices, Cautions, Warnings, and Dangers.
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2Five Owner’s Guide
MAINTENANCE PROCEDURES
BATTERY CHARGING AND MAINTENANCE
Batteries
To prevent battery explosion that could result in severe personal injury or death,
keep all smoking materials, open flames or sparks away from the batteries.
Hydrogen gas is formed when charging batteries. Do not charge batteries without
adequate ventilation. A 4% concentration of hydrogen gas is explosive.
Be sure that the key switch is off and all electrical accessories are turned off
before starting work on the vehicle.
Never disconnect a circuit under load at a battery terminal.