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Lenovo ThinkPad X220-4287 Power Adapter
When choosing a new charger, choosing the Lenovo brand one is always going to be the safest and easiest way to go. If buying off-brand, make sure to check both the volts and amps outputs. Due to the fact that one Lenovo adapter can be used on other units, make sure you check the part number for the correct one. The Lenovo ThinkPad X220-4287 AC adapter is needed for two reasons, to charge the onboard battery and to provide a source of power for the unit. A universal power adapter is a possibility if yours is unavailable or backordered.
Red flags your power adapter will not last the year
- Most Lenovo AC adapters can get quite warm when they are plugged in for a period of time
- Your Lenovo battery refuses to charge up completely
- The laptop does not work without the battery installed
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