LG Vortex User Manual page 286

Safety
284
Improper battery use may result in a fire, explosion or other
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hazard.
For those host devices that utilize a USB port as a charging
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source, check the host device's user manual for the USB-IF logo
or some other means to ensure that it has completed the USB-IF
compliance program.
Charger and Adapter Safety
The charger and adapter are intended for indoor use only.
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Insert the battery pack charger vertically into the wall power
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socket.
Only use the approved battery charger. Otherwise, you may
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cause serious damage to your phone.
Use the correct adapter for your phone when using the battery
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pack charger abroad.
Battery Information and Care
Please dispose of your battery properly or take it to your local
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wireless carrier for recycling.
The battery doesn't need to be empty before recharging.
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Use only LG-approved chargers specific to your phone model
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since they are designed to maximize battery life.
Do not disassemble or short-circuit the battery.
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Keep the battery's metal contacts clean.
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Replace the battery when it no longer provides acceptable
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performance. The battery can be recharged several hundred times
before replacement.