It is recommended to use them in turn. When the first battery is almost exhausted, you can fully charge the other battery as a spare, because the battery is partially charged when it leaves the factory, and it is. not charged when placed. Batteries and electrical appliances that have been left out of use for too long are easily damaged, so they should be used sparingly.
Can we do without the lithium battery in a new cell phone?
Introduction Can you use lithium battery in new cell phone? It is recommended to use it in turns. When the first battery is almost exhausted, you can fill the other one as a backup battery, because the battery is originally shipped from the factory. .