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Acer Answers

No power or intermittent battery charge may be due to wrong AC adapter on VN7 Nitro series.

Why does my Acer Aspire VN7 Nitro not charge consistently?

There are 2 different wattage adapters approved for the Nitro series of notebooks. The correct approved AC adapter for a Nitro notebook can be identified by looking at the DC Rating label on the bottom of the notebook.

19V @ 4.7A corresponds to the 90W adapter.

19V @ 7.1A corresponds to the 135W adapter

The 90 Watt blue tip adapter has a smaller hole. The 135 Watt orange tip adapter has a larger hole.

If the larger orange tip 135W adapter is used with a 90W blue DC-in port notebook, the 90W notebook may have problems powering up or charging the battery. The smaller DC-in port pin on the 90W notebook doesn't make good contact with the larger hole on the 135W adapter.