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Reviews around battery (5.00 of 5)
ViewSonic M1 Portable Projector with Dual Harman Kardon Speakers HDMI USB Type C Automatic Vertical Keystone and Built-in Battery
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Beefy battery is awesome - 3+ hours projector AND steaming device (Chromecast).
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Good picture very good sound quality & size & battery & price is
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I like the rechargeable battery for areas where there isn't a power supply
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