Hi Gudr, thanks for your question. We would advise you to use standard AA batteries, as the Nintendo Wii remote has been designed and tested with these batteries. You are able to use a charging unit. However, as this is a third party item, it has not been tested with the Official Nintendo Wii remotes, therefore we cannot gurantee this will work correctly. We hope this helps. Thanks for contacting Nintendo using Argos Q&A.
Nintendo Product Expert
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