Bitcoin is not a battery. Its fiat currency that uses a lot of energy to perform a fraction of the transactions that would be needed for it to be used for normal day to day transactions (filling up your gas tank, buying a coffee, etc).
If anything, I'd say Bitcoin is the exact opposite of a battery, it's an energy sink. I say that because its fiat money. With the example used of aluminum, you've taken energy and made a durable good/commodity. You don't need to have faith in aluminum that it exists, it just there. Drop it on your foot and you'll have proof. With Bitcoin, it will just take a lack of faith and the whole thing becomes worthless.
Bitcoin is interesting, it might become a reserve/hedge investment like diamonds or gold. But let's not put it in the halls of the Duracell bunny.