Royal Enfield METEOR 350 2021 Owner's Manual page 79

MINOR MAINTENANCE TIPS
CAUTION
The battery must be periodically checked for
cleanliness and corrosion free terminals.
The poor contact or loose fitment of battery
terminals may cause electrical / electronic parts
failure.
Always disconnect the black negative (-ve) battery
cable first and then the red negative (+ve) cable
while removing the battery connections.
For checking the battery voltage check with multi-
meter in Voltage mode or contact Royal Enfield
Authorised Service Centre or battery service centre.
Clean the wire terminals free from corrosion and
keep the terminals coated with petroleum jelly.
Keep the (+ve) positive terminal and (-ve) negative
terminal cables firmly connected to the respective
battery terminals. Failure to do so may result in
damage to the motorcycle electrical system.
Royal Enfield Meteor 77