All of us want to prolong our battery's life. But without question every battery has a natural course of aging. After used for a long time, the battery get weak. This is cannot be eliminated, but we can prolong this aging course by using suitable method. Usually if you want to prolong your battery's life ,you must pay attention to 3 steps in using battery : 1.Store battery : Put your batteries in a cool and dry place when you store it. Do not charge your lithum batteries too full before storage. After using the laptop battery ,please clean up the metal terminals with a soft dry clean cloth. Before storage, you should confirm your is not fully depleted. If empty, charge for about 30 minutes . Usually a lithium-ion battery should be stored at about 40% state-of-charge. The suitable storage temperature for batteries is around 15°C Please notice this: weak batteries charge faster and remain on 'ready' indicator longer than strong ones. Also it only be used for a short time.So do not buy a used battery even if it is very cheap because used battery usually means weak battery. 2.Charge battery : Most battery can be fully charged in about 3 hours so do not leave a battery in a charger for a long time. When you prepare to charge your battery ,make sure the temperature is around the room temperature. Especially need to pay attention is avoid over-charging and over-discharging. Do not charged to higher voltages than its threshold voltage ,as it would become unsafe. Prepare a new battery for replacement if your battery get weak over time. Please notice this: It is not very distinct to reduce the charge time by increasing the charge current . 3.Maintain battery : Rechargeable batteries do not break suddenly but slowly get powerless over time. Right regular battery maintenance is necessary. Most battery can be fully charged in about 3 hours so do not leave a battery in a charger for a long time. Use soft and dry cloth to clean your battery after using it. Store it in a cool and dry place (The suitable temperature is about 15°C). Do not charge your battery before fully discharged . Usually a lithium-ion battery should be stored at about 40% state-of-charge, because laptop battery's self discharge can break the battery in the storage . If possible, reduce the times of using the battery. Please take out the battery from your machine when it is not being used. In the end I hope you can take better care of your batteries. You need them for your daily life.