First, there is no marked specific "capacity":
No clearly marked capacity (2200MAH, 4400MAH, 6600MAH, etc.) batteries, most likely is the use of inferior battery or "recycle" (foreigners used second-hand dolly), the price cheap but short life, inconsistent quality careless use may damage your laptop!
Second, there is no guarantee that "standby time":
"Standby time" after the batteries into the notebook to the next charge of continuous use. Salesperson can not guarantee that "standby time", it means the battery can not be guaranteed not to use "bad cell" or "recycle."
Third, whether the installation of "security board":
No "protection circuit board", then there may be deformation of lithium batteries, liquid leakage, risk of explosion. In the vicious price-cutting competition, lower prices for the protection of various circuit boards, or simply omit the device, making the market flooded with a blasting dangerous lithium batteries. Users can not identify from the appearance of "protection circuit", totally want to rely on oral business, it must choose to buy from reputable merchants.
http://www.goodbuy2012.com
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