On the train, on the beach, on the hills, wherever you are, the Brunton Metal 4400 will keep your phone, MP3 player, GPS naviator or other portable electronic device powered and ready to go. The sleek, compact shell easily tucks away into your pocket, backpack or briefcase. The high grade lithium polymer battery can be charge in just four hours from your home computer or the mains adapter, and devices can be powered through either the micro USB connector or the standard USB connector.
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