just mobile Gum Pro PP-08 Portable USB Power Pack
Experience with two Specimens
I had used the first one very often and therefore its battery did not last as long as the second one, which was used less often.
BTW: Every device pulls only the energy it needs for charging and regular operating.
With this portable power pack you can charge your smartphone completely mostly two times independent from power grid connections – of course depending from the battery size of your smartphone. Most of the time the energy will rest for some charge procedures of a bluetooth headset.
That was my personal experience at winter 2011 (Gum Pro in a vest pocket, and a coat over it).
More Charging Procedures possible at warm Weather
Lithium-Ion accumulators are sensitive to cold. Since end of March 2011 the just mobile Gum Pro PP-08 could charge two smartphone accumulators before it needs charging itself.
Next page: Battery Performance …