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Sony VGN-B55T Power Adapter
Because Sony uses one power charger that powers multiple other machines, be certain to thoroughly note the part number that is needed for this model. Upon choosing a replacement AC charger, the actual Sony brand will probably be the safest way to go. The Sony VGN-B55T AC adapter has two main uses, to charge up the main battery while simultaneously providing power for the laptop. A universal AC adapter can be used if you absolutely need to. If buying off-brand, make note of both the voltage and amperage output.
Major warnings of a weakening charger
- Your Sony battery refuses to charge completely
- Most Sony AC adapters will get very warm to the touch when plugged in for any length of time
- The unit will not function while solely using the AC adapter
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