Energy transfer

all i used to do was swap the batteries in their place and it would keep working

Give em the ol spiny spiny works great

Sadly more modern remotes aren’t always as robust. Older remotes required very little power to function. More modern remotes with things like blue tooth, touch screens, WiFi, headphone jacks or audio capabilities, etc. tend to still last awhile, but not nearly as long and the old tricks don’t help much or at all. Like cell phones, the more features we add, the more power hungry they become.

This is the basis of most of Elon’s battery advancements.