LG K8 Guia Del Usuario página 104

If you need to replace the battery, take it to the nearest authorised
LG Electronics service point or dealer for assistance.
Always unplug the charger from the wall socket after the phone is
fully charged to save unnecessary power consumption of the charger.
Actual battery life will depend on network configuration, product
settings, usage patterns, battery and environmental conditions.
Make sure that no sharp-edged items such as animal's teeth or nails,
come into contact with the battery. This could cause a fire.
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