Toyota 2010 Prius Owner's Manual page 460

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12 volt battery exterior
Make sure that the 12 volt battery terminals are not corroded
and that there are no loose connections, cracks, or loose
clamps.
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Before recharging
When recharging, the 12 volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, before recharging:
●
If recharging with the 12 volt battery installed on the vehicle, be sure to
disconnect the ground cable.
●
Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12 volt battery.
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Terminals
Hold-down clamp
Umar: 03214530584
4-3. Do-it-yourself maintenance
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