DC can be stored in batteries, while we cannot store AC [closed]

i have heard that direct current can be stored in batteries, but we can not store alternating current. is it true? if yes, then why?

closed as unclear what you're asking by user36790, ACuriousMind♦, gigacyan, Hritik Narayan, CuriousOneJun 7 '16 at 8:00

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• Nothing stops you from creating AC from DC with a fairly simple electronic circuit. Technically batteries are also not storing "DC" but chemical energy. – CuriousOne Jun 6 '16 at 8:18
• We can also 'store AC', to the extent that makes sense, for instance in a flywheel or in a pumped-storage system which drives AC generators. – tfb Jun 6 '16 at 8:53
• It's not clear what you mean by "store AC" in constrast to "store DC". What about the chemical energy in a battery is "DC"? – ACuriousMind Jun 6 '16 at 10:15
• You don't store current. You store a potential energy difference. When the energy is released, this might make electrons move, which would be a current. – Steeven Jun 6 '16 at 14:00
• You can convert DC to AC using oscillators. – philip_0008 Jun 6 '16 at 14:05

A battery is conceptually very similar to a water pump. A pump creates a pressure difference between its two ends so water flows in an external circuit from the high pressure end, through the circuit and back to the low pressure end. A battery creates a difference in the electrical pressure$^1$ between its two end so electrons will flow out of the anode, though an external circuit and back into the cathode.
$^1$ electrical pressure isn't a concept physicists would normally use since we would talk about the electron potential energy. However it is an equivalent concept. Electrons in a metal behave in a surprisingly similar way to a gas.