good for a single charge on most phones, or half a charge on a maxx.

 

I have it. Works good for a single charge and is compact. Holds a charge for quite some time too.

 

I have something similar...bought off amazon. I believe its called the isound. 15,000. Yes 15k mah battery with a light and 4 USB ports. Only $50. Best back up ever. Small too

 

I've tried 2 different ones that I got on Amazon. First was an Anker 5600 mAh for $35. Nice and compact. It would re-charge my Razr Maxx 3300 mAh battery to full once, but that was about it, so I returned it. Then I got an Incredicharge 8800 mAh for $32. It can recharge the Maxx almost twice and is only a little bit bigger than the Anker 5600. You can also charge 2 things at once which is a nice feature. The one you posted has a lot lower mAh capacity but I've never tried it. These portable chargers are nice to have in a pinch. Based on my experience, you can't really expect to get the full amount of advertised capacity, but I'm happy with the Incredicharge as it will allow me to go at least 5 or 6 days without plugging into a wall charger if I don't have access to one.

 

My wife and I hit the ATV trails and camp a couple weekends during the summer. I use my phone for GPS on the trails and needed something that could charge my phone as much as I needed. Its a little more expensive, but the Goal0 7M Solar Panel works great. It about $70 on Amazon