Very difficult to assess without testing components, it will depend on how long the connection was made to how far the problems will go, first thing is to visually inspect the boards for damaged components and replace these, (probably hard to spec if damaged so will need a donor to compare) then a specialist would test each component using an oscilloscope before power testing as you may have short circuits. Connect AA batteries to test, why a lipo was used I do not know the handset batteries last months in my DX's
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