Using Li-Ion ACER Aspire 4551G share battery for your notebook which can work longer time than Non Li-Lon one.It is better to defragmentation regularly for your notebook battery life. In order to reduce the laptop power consumpition, you can use some optical drive spin-down and hard drive in your laptop.Please keep your laptop in sleep or standby model without long time using, which both save the ACER Aspire 4551G battery power and extend ACER Aspire 4551G Battery using life.
More laptop battery info at:
http://www.lovebattery.net/product_detail.asp?id=7488
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