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Lenovo ThinkPad T400 Power Adapter
The Lenovo ThinkPad T400 AC adapter is needed for two reasons, to charge up the main battery and powering the laptop. Because Lenovo has been known to use a single AC adapter that is probably used on other similar units, be certain you select the correct one for the ThinkPad T400 model. A universal AC adapter can be used if yours is unavailable or backordered. If buying off-brand, please check on the output of amps and voltage. Upon choosing a replacement adapter, choosing the Lenovo brand one is always going to be the safest and easiest way to go.
Major clues of a dying charger
- The laptop does not function using just the AC power adapter
- Battery does not charge at all
- The majority of Lenovo power chargers will get warm to the touch when they are plugged in for a period of time
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