The charger's battery is supposedly rated around 2000mAh. After initial conditioning, I'm finding this to be far from the truth. I've used it to charge 2 of my devices, 1 with a 1000mAh battery and the other with a 1350mAh battery; both are lituim ion. Both devices were powered completely off while charging, so there was no power being consumed.

Prior to testing, I depleted the partial charge of the PowerGear, and then charged it 12 hours past when the LED's indicated it had a full charge. I depleted it twice more, followed by charging it a full 6 hours past the LED's indicating it was ready to go.

The GearPower runs out of juice when either device reaches around 75% of a charge. I was expecting 1.5 charges out of the GearPower Portable Battery.

It's better than nothing, but not nearly as good as advertised.

I wasn't exactly sure what this item did, but was pleasantly surprised at the purpose of this item. I charged this item on my PC USB port. It took a few hours. It has a lot of different adaptors (for different cell phones, bluetooth earphones and other small electronics. You can charge your items from this device pretty easily. I can get a full charge on my cell phone in less than 2 hours from it. This is a really great concepts when you are out and about and on your cell a lot. But this is only good if you have a PC somewhere to be able to recharge the unit. Another big problem is that the quality of the adaptors and or the unit make a tight secure fit not good, so you can't just put it in your purse because the connection won't stay together. I still use it, but I am going to look for a more expensive, higher quality item. Also, you can only get 1 charge for the cell phone out of it, which is better than nothing. I also want a unit that I don't have to recharge after I use it. What good is that. I may as well just recharge the device. Overall, it's not a bad item for the money. I should have given this 3 stars.