Great little unit, versatile and very practical.
The unit comes already fully charged. It holds enough power to charge 2 normal smartphone batteries (but only 1 Samsung note battery).
Charging the pack from the mains power is easy and fast. Charging from sun, however is an entirely different matter. It takes a full day to charge 1 bar on this power bank,( out of a possible 4 bars) 2 full days for 2 bars and then it doesn't matter how long (weeks even) you leave it - it will not charge past 2 bars from sun's energy. So, don't rely on the solar aspect as it is not efficient. Considering the fact it can charge 2 phones from full this is good value for money but the blurb says it can do 2 phones simultaneously and it has 2 USB ports for this purpose - BUT - it actually only will charge 1 at a time - even if both are plugged in to it - so don't rely on that either. Overall, it is lightweight, sturdy and will last days of hiking and hold enough charge for 2 re-charges but make sure it is fully charged before you go & hang on pack so it can grab any solar light to maintain full charge. I would recommend it as a power bank but not as a solar power bank as I think it has a ways to go before it could be relied upon for this.
Easy to use, Compact, Build quality, Battery life
Would you recommend this product to a friend? Yes