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The nuvi 57LM does have an internal battery, which charges whenever the device is connected to power. The maximum battery life is 2 hours. Brighter backlight, higher volume, and active navigation can all contribute to a faster-draining battery. The device is meant to be connected to vehicle power whenever possible during use. -MH
Sorry, there was a problem. Please try again later.No, it has a rechargeable battery good for a few hours if fully charged.
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