The Trimble TopoCharger is part battery case, part mapping GPS
The Trimble TopoCharger provides iPhone users with extra battery life and color topographical maps for 49 US states
Smartphones have all but replaced standalone GPS units for basic car and foot navigation in cities and on highways, but without apps like the ViewRanger, they aren't equipped to guide you around forests, mountains and trails. The new Trimble TopoCharger brings another such app, along with a full set of topographical maps and a full-sized back-up battery. Pop this case on, and the iPhone transforms into an outdoor GPS.
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