Accidentally invented something

Of course not. It can't be used for profit.

Well actually people who make electronics like phones and laptops are probably ecstatic about this. It will make their product far more desirable. In fact due to this reason the battery companies would jump all over this to sell these batteries to those companies and the only profit decline would happen in there raw commercial batteries like double A's which isn't even where there biggest profits come from.

It lasts 400 years because you can charge it so much. Most batteries you either can't recharge or they can only be recharged X amount of times

Ummm like everything. Carmel was milk warmed to long, antibiotics were made when someone left a mold culture to long, and soy sauce someone just kept messing up till they made something tasty. 3 ingredients, 10000000 steps, all taste like ass except the last step. %100 stubbornness is what soy sauce is.