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Lenovo ThinkPad R51 Power Adapter
Upon choosing a replacement adapter, the actual Lenovo brand is the best one to choose. If you decide to buy an non-Lenovo adapter, make note of both the voltage and amperage output. Because Lenovo uses one power charger that is most likely used on other laptop models, make sure you check the part number for the correct one. A universal AC adapter is another possibility if yours is unavailable or backordered. The Lenovo ThinkPad R51 AC adapter is responsible for two things, to charge any and all batteries and powering the laptop.
Red flags your laptop charger is in dire straights
- The laptop does not operate using just the AC power adapter
- Battery does not charge up at all
- Most Lenovo adapters will get warm to the touch when plugged in for any length of time
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