Isn't a battery just a name for the collection of battery cells? Tesla's (the car) battery is composed from a lot of units that can store electricity. Some RC

Isn't a battery just a name for the collection of battery cells? Tesla's (the car) battery is composed from a lot of units that can store electricity. Some RC batteries are just different cells/smaller batteries that are combined together in a nice package. I think even the batteries in cell phones are composed from different components (some of which doesn't even store energy).