Solar powered cellphone

[Stefan]

No need to get cross eyed. Here are some posts for you:

Charcher for batteries

I’m usually charging with a 2 A charger (since a year), everything works fine. I think 1 A is rather recommended as minimum. You may also want to have a look at this: and this:

1,2 A charger ok for FP2?

As I got my FP2 today I tried my old original FP1-charger for it, which worked. Power consumption during charging, phone power off (measured with a power meter): FP1: P=5.5W => 1,1 A if 5V is provided => calculation: 1h50m for a full charge (2000 mAh), ~2h in reality! FP2: P=7.7W => 1,54 A if 5V is provided => calculation: 1h36m for a full charge (2450 mAh), if linearity is assumed Thats only with the original FP1-charger to give you some minimalistic values, what the FP2 should do. Most …

####Bottom line:

• Fairphone 2 needs 5V, which is USB standard (if the solar power bank has a USB outlet, it will be 5V).
• Amperage can be 1A to 2A.
• Watts is simply the product of voltage and amperage, so the charger would be providing 5W to 10W.