rechargeble cell?

Question

After a long time we don't use the applicance, why do we need to recharge the rechargeable frequently?
Is that true, if we keep leave a rechargeable battery for 1 or 2 or 3 years, is that true that the cell will permantly die? Why?

Your answers always say it forgets to charge fully, but why it forgets/
What is the chemical principal behing the forget action.

Answer 1

Depending on the kind of cell, the chemistry is continuing and the cell is detereorating inside. Most rechargeable cells will gradually lose their charge and most prefer to "rest" fully charged because of the conditions when fully vs. partly charged. Lead acid gel cells used in toys, high output flash lights, and security systems as well as the lead acid batteries used in cars, boats, etc., are particularly prone to this.

Answer 2

It has a memory. If you charge it when it doesn't need it then it charges if it were dead starting at the halfway or whatever point. Pretty soon these points get closer and closer together, till you finally have enough battery to brush one tooth or call information before it goes dead, even though the battery is anatomically still good.

Answer 3

it loses it's ability to remember to charge fully and it just charges shorter so it's kinda like the limit to charge falls lower and lower until eventually it won't allow itself to charge eventually it's chemical makeup runs out of juice