Use batteries and chargers only provided and approved by VK.
The batteries are consumables and will eventually wear out.
Avoid charging in strong heat or extreme cold. Ambient room temperature is
preferable. The battery has its optimum performance at an ambient
temperature (+5
℃
to +50
℃).
Never replace the battery by a non-approved battery.
Never try to open the battery as it contains substances that might be harmful
if swallowed or allowed to come into contact with unprotected skin.
