4 of 5 people found the following review helpful
So far so good!,
Verified Purchase(What is this?)
This review is from: PortaPow 11W High Efficiency Rainproof USB Solar Charger (Accessory)
FIRST: I would recommend buying the portapow USB power Monitor with this device otherwise you will not know exactly how much power you are generating.
This solar panel is smaller than I thought. Not too small, but smaller than I imagined. Each panel is about the size of A4 paper. Folded up they take up very little space indeed and it is quite light as well.
Each panel has a pocket at the back with a usb cable for connecting. I plugged my Nexus 4 into one of the USBs to charge and the phone began to charge ok. However, the phone began to bleep straight away as it appeared to be on/off charging... not getting a full current.
Luckily I had bought the PortaPow USB Power monitor and found that the panels were only processing 4.8volts. The phone needs 5.15volts to give it a proper charge - I'm not sure if the phone would still charge without damaging the phones battery but I thought best not to risk it.
The weather was over cast and raining and I was surprised i was getting as much power as I was.
The next day was full of sunshine (June 1st 2014 - UK) and I tried again. This time the panels were throwing out 5.28volts, more than enough to charge the phone properly. It took no longer than normal to charge the phone.
Great for sunny days but just misses on cloudy days... by a fraction! Overall this is great and i will report back to see if it can charge a phone safely on cloudy days without full power.