Why can't batteries be used for everything?

Answer 1

-- They're no good at doing English homework, making cake batter,

or painting portraits.

-- For the things they're able to do, they're too heavy and expensive, they

tend to run out of gas and die after a while, and they're hard to dispose of

in an environmentally friendly way.

-- If you say "But we can use rechargeable batteries so we never need to

dispose of them or buy new ones.", I would say "Fine, that'll work. But if you're

going to buy a battery charger that plugs into the wall and charges your batteries,

then you haven't gained anything. Why not just forget about the batteries and plug

the appliances into the wall in the first place ?"

Answer 2

because they dont haaa