The only way to do that is to make a whole new part or to repair that part.
If you dont want to start from scratch, then you will need chemicals.
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Here are the best of them.
The best place to find chemicals is inside anyARDA facility, whether it be anARDA Toweror anARDA Trailer.
ARDA Facilities can be found by looking forsmall satellite icons affixed to structures on the map.
Inside ARDA facilities, there is a chance for ahazardous materials metal storage cabinetto spawn.
Inside these cabinets is where you will find chemicals.
In fact,one of the best early-game solutionsto battery problems, theSide Battery, requires chemicals to use.