IBM 40Y7003 Battery – How to avoid early death?

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IBM 40Y7003 laptop battery is with 4800mAh capacity and works for ThinkPad X60, X61 Tablet PC). It’s 14.8 / 14.4V, the cell type is Li-ion, and it is compatible with OEM IBM 40Y6999,40Y7001, 40Y7003, ASM92P1170, ASM92P1174, FRU92P1163, FRU92P1165, FRU92P1167, FRU92P1169, FRU92P1171, FRU92P1173, and FRU92P1227, and the market price is from $40 to $150 since there are a lot of 3-party manufacturers who are able to make replacement batteries of the IBM 40Y7003.

However, although the compatible battery costs not much, you can save the money if you store your original IBM 40Y7003 battery properly.


Li-Ion battery lifespan is around 1,000 charge cycle (charge and discharge) or 2-4 years under normal operating conditions. If you do not have to use your IBM 40Y7003 battery, then store it at 40% charge level and keep it cool. The 40% charge assures a stable condition even if self-discharge robs some of the battery’s energy. Most battery manufacturers store Li-ion batteries at 15°C (59°F) and at 40 percent charge. Keeping IBM 40Y7003 laptop battery on constant charge and never using it is not good for the laptop battery. Run the battery down and recharging it at least once every month.


Besides of storage, people might think about that will their IBM 40Y7003 battery’s life span decrease if it’s overcharged. Over-charging occurs when the charger keeps the battery at a temperature that is warm to touch (body temperature) while in ready condition, and Li-Ion laptop batteries have built-in controller chips which prevent it from overcharging, as they can explode if overcharged, so your IBM 40Y7003 notebook battery should not be allowed to get warm in a charger. If you have this happen, the battery is no good or the charger is not working properly. Don’t continue to use the battery or charger if this happens.


However, the 40Y7003 battery may be damaged by extensive overcharging (continuously on a charger for more than 24 hours). Damage to the battery from overcharging would only occur in the very unlikely event of a malfunction of the charging system.



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