I recently lashed out about $7 for a battery pack that holds 4 x AA batteries, providing 5v, and has a USB output.
I have 4 rechargeable and recharged 2000mA batteries in the pack. I rigged this up to my iPhone (4) today to see how it charged. It gains about 8% charge every 2hrs.
Is this the sort of speed of charge I would expect from other battery packs, as discussed on the forum, or is there something I've missed? Sadly,I currently seem to have minimal electrical understanding. Does more mA in the battery pack mean quicker charge?
Andrew A