E-Wheels EW-74 Owner's Manual page 10

The smart charger included with your scooter will shut off its high current
mode when the scooter is fully charged. When the light on the charger is red,
the scooter is still charging. When the light turns green, this means the scooter
is fully charged. Once fully charged, unplug within two hours to avoid
overcharging.
The charging time varies depending on how charged the batteries are. If almost
empty, the charge time may take up to 8 hours. If the red light stays on for
more than 8 hours, unplug the charger.
Batteries and Battery Maintenance:
Only use the recommend batteries for your scooter. Do not use lithium ion
batteries. The batteries can be charged as needed without causing damage.
You can wait until low, or charge right after a short ride. Avoid leaving on the
charger for an extended period to avoid potential damage.
Specification of the battery that we recommend:
Type: (4) 12 volt, 20 AH, Deep Cycle, Maintenance Free, Sealed Lead Acid
Note:
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