How to Charge Flashlight in Subnautica
Craft a Battery Charger once you have the blueprint. Use it to recharge your Batteries, including the one in your flashlight!
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I usually just carry spare Batteries. Way easier than messing around with a Charger. Quick and painless!
Just pop in a fresh Battery! Open your inventory, swap out the old Battery for a new one, and you're good to go.
You need a functional Base or Cyclops with a Battery Charger installed. Stick your empty Batteries in there, wait a bit, and they'll be good as new.
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