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Lenovo ThinkPad 720C Power Adapter
When choosing a new adapter, the actual Lenovo brand is usually going to be the safest choice. The Lenovo ThinkPad 720C power adapter has two main uses, to charge up the main battery while simultaneously providing power for the laptop. A universal power adapter is a possibility if you absolutely need to. Because Lenovo has been known to use a single AC adapter that is probably used on other similar units, be sure you choose the right one. If you decide to buy an non-Lenovo adapter, make note of both the voltage and amperage output.
Signals of an unhealthy power adapter
- Battery does not charge up at all
- The unit will not run using just the AC power adapter
- Most Lenovo adapters get warm when plugged in for any length of time
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