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Sony VGN-FS850 Battery
Your Sony VGN-FS850 battery allows you to move freely about so that you can use it where you want. Buying a battery with a higher milliamp rating is fine, it simply means it is a stronger battery. What really is critical to a battery fitting your laptop is the physical size of the battery as well as the connection. Not all batteries are the same, make sure and double-check the part number of the new battery and compare it to the old battery. More amps in a battery basically means the longer it will last on a single charge.
Red flags the primary battery will have to be replaced
- The unit does not turn on while not connected to the AC adapter
- The laptop lasts less than an hour while unplugged
- The battery has its case swollen and looks like it will explode
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