I must warn any potential buyer: this device has serious quality control issues! I had to send the device back because it no longer worked. If I shook the case or wires I could get it to work for a few minutes and then it would stop again. While this is a good concept and the reason I bought it was to have an ammeter so you can see the charging speed, it does have a serious limitation. First I noticed that any shadow, like the sun hiding behind a tree, reduces the milliamp output to almost zero. It's a very bright day. Second, it can only charge 2 and only 2 batteries at a time. Since I have at least a dozen devices that use 3 batteries, I can't get my devices to work until 2 of them fail and need charging. Since I already had a solar charger, I decided to go with a USB device that charges 1 to 4 batteries.
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