o ‧ ver ‧ charge /ˌəʊvəˈtʃɑːdʒ $ ˌoʊvərˈtʃɑːrdʒ/ BrE AmE verb
1 . [intransitive and transitive] to charge someone too much money for something OPP undercharge :
They were being overcharged for cheap beer.
2 . [transitive] to put too much power into a ↑ battery or electrical system