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Apple PowerBook 540C Power Adapter
If you decide to buy an non-Apple adapter, make sure to check both the voltage and amperage output. When choosing a new AC adapter, selecting the Apple OEM charger is the best one to choose. The Apple PowerBook 540C AC adapter is needed for two reasons, to charge up the main battery while simultaneously providing power for the laptop. Due to the fact that one Apple adapter can be used on other units, be certain you select the correct one for the PowerBook 540C model. A universal power adapter is a possibility if yours is unavailable or backordered.
Some clues your power adapter is dying
- The majority of Apple power chargers get warm when they are plugged in for a period of time
- The laptop does not function while just using AC power
- Battery does not charge up every time
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