There should be a Charging Cable that you can craft with 2 titanium and 1 lead. You can refill it with Lead and it has a maximum of 60 Bytes. You can use it on a Seamoth or Prawn Suit to slowly charge it while using up Bytes, It will not charge if the cable is at 0 Bytes or if the player is in the vehicle. There is an Ion Upgrade that refills with Ion Cubes instead of lead and has a maximum of 300 bytes.