Вот цитата из GP
• Always store batteries in a cool, dry place.
• After long storage, e.g. over a year, it is desirable to cycle
(charge/discharge) the battery 3 times to restore full capacity.
• Do not mix batteries with metal objects during storage or
transportation to avoid accidental short-circuit.
• Do not store large quantities of batteries in a densely
packed condition when they are in a charged or partially
charged state.
непонятно в каком состоянии закладывать на хранение, во многих англоязычных ресурсах есть подобное упоминание о необходимости периодического проведения циклов зарядки/разрядки для восстановления емкости, но в каком состоянии класть на хранение не упоминается.
Видел упоминание resilitent (упругости) NiCd что делает не очень важным состояние, в котором акк.
кладутся на хранение.
Или вот еще
In mirror contrast to lead acid, a NiCd's life is downright racy. Some can be used with fast chargers and others are even self-charging. NiCds should be stored in a discharged state. Remember, to avoid voltage depression don't overcharge a NiCd, discharge it completely or put one not built for the fast life on a quick charger.
Еще
NiCd - Nickel Cadmium - are intended to be charged, drained fully when used, then recharged and used again. They will last for years when used this way. I have a few that are over 10 years old. Most people think if they leave them on CHARGE all the time they will always be ready to go; but this is not true. If left on CHARGE all the time, they will exhibit MEMORY EFFECT, and will actually lose their ability to properly discharge and recharge. If you intend to store NiCD batteries, they should be in a nearly fully discharged condition, then charge them up when you are ready to use them. They have a slow self-discharge, and will lose a lot of their charge after a few of months. That's why, when you buy them, you have to charge them before use. They are shipped to stores uncharged.