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Sony VGN-FW390 Battery
Your Sony VGN-FW390 battery makes your laptop portable so as to work or play wherever you fancy. Getting a battery with a higher amp rating is OK, it just means the battery will go further on a single charge. What really is critical to a battery fitting your laptop is the connection type and physical size of the battery. The larger the battery, the longer you will be able to use the laptop on one charge. Not all batteries are the same, be sure to check the model number and compare it to the one you are going to replace.
Major indications of an ailing li-ion battery
- The unit does not turn on at all when unplugged
- The laptop lasts under ten minutes before it dies
- The battery has its case swollen like its about to burst
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