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Sony VGN-FS640-W Power Adapter
When purchasing a replacement AC charger, the actual Sony brand is always going to be the safest and easiest way to go. Because Sony has been known to use a single AC adapter that can be used on other units, double-check the part number or model number of the adapter. The Sony VGN-FS640-W AC adapter has two main uses, to charge up the main battery and powering the laptop. A universal AC adapter is another possibility if you absolutely need to. If your decision is to purchase a different brand charger, make note of both the voltage and amperage output.
Major warnings your power adapter should need replacing
- Most Sony adapters can get quite warm when plugged in for any length of time
- The laptop does not function without the battery installed
- Battery does not charge up every time
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