If your smartphone is not an Apple product, you may be in luck to be able to use the standard micro-USB connector for your power. This ergonomic adapter from Energenie combines a 1400 mAh or 2000 mAh power pack with a stick on surface and a holder that’s ideal for use on a train or during a flight to watch a video or play games. If oil and fingerprints accumulate on the surface, a quick clean with soap and water will restore the tackiness of the surface. The company also has portable power packs up to 40,000 mAh.
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