Is it possible to create a self-charging battery?

Batteries are for storage, not power generation. It’s possible to attach a solar cell or something to a battery, though. Exactly how much battery are we dealing with? What do you want to do with it?

Nope. On Fluther we obey the laws of thermodynamics. Sorry.

Citizen makes watches that never need a new battery. The battery is constantly being recharged based on motions made by your hand. So we can obey the laws of thermodynamics and recharge our batteries without having to worry about where the energy is coming from.

If you want to make “self-charging” batteries, you need a source of energy, like solar panels or whatever. Perhaps you can take advantage of some other constant motion in order to recharge the battery you are thinking of. You just have to be clever about capturing energy. Energy is being thrown around all over the place all the time. If you can find a way of capturing some of it, then you might be able to use that to recharge a battery.

People use wind and sun and waves and the flow of water and geothermal temperature differentials. The potential sources of energy are all over the place, waiting for someone to develop a means of converting that energy into battery charging.

@wundayatta I realise that this verges on pointless semantics but if the battery requires a large mass of hydrogen in stellar nucleosynthesis producing a luminous gas plasma in the interstellar volume that you wish to operate it then it hardly counts as “self-charging”.

Yes, it is possible, but as of now, not feasible.
Possibilities could include:
– photovoltaic shell, dependent on light.
– using ambient EM radiation, like the old crystal radios, minimum recharge rate
– tapping the virtually infinite pool of zero point energy, theoretical possibility currently under dispute and as of now practically not possible.

@Lightlyseared It is semantics, and the term wasn’t defined. You are perfectly right to interpret as you see fit. I gave the OP a bit more latitude, which was justified, I feel, given the example of the Citizen eco-drive watch. Since I don’t have to do anything, it seems like the watch is self recharging, or “self-winding.”