Battery Charger (Subnautica)

The Battery Charger is an in-development Placeable Item that charges Batteries, as the title implies.

Uses
The Battery Charger apparently be able to recharge up to four Batteries simultaneously, allowing them to be re-used again multiple times.

A screen featured on the Battery Charger shows the charge percentage of each battery.

Recipe
Battery Charger fragments are located in the Grassy Plateaus. Three are required to unlock its blueprint.