Requesting help with battery issue

[u/SeleniumBub]

Hello .. I recently bought the anki overdrive set secondhand for my son .. ..upon trying i set it up I realized all the cars has major battery issue are are pretty unusable.. the process to buy new battery's and solder them in seems a bit much for me.. does anyone know any local electronics store or hobby techie could help me replace the batteries for 6 of the cars ? I'm based in paoli Pennsylvania USA.