Battery-backed USB power source/charger?

[Charles Kozierok]

I have an MP3 player I use extensively that has an internal battery charged by USB. It lasts about 10 hours, which is usually enough, but sometimes I forget to charge it. So I wanted to get some sort of "backup" device, say something that uses 4xAA NiMH and provides a 5V USB output I can use for the player.

I know there's lots of these out there, but most are cheap junk and so I was hoping some of you folks might have had some personal experience with them.

Thanks.

 

[Spoooon]

I've heard some good things about the portable chargers at monoprice. Of course, ymmv.

Was thinking about getting one of these: http://www.monoprice.com/products/p...=10833&cs_id=1083110&p_id=9283&seq=1&format=2

 

[stormkroe]

I found some 2200mah USB batteries at a Canadian tire store, they were clearenced from $29 to $3.50 or so. I bought 2 because why not. They don't last as long as my internal battery which is stock EVO 3d, but i'd peg them at 1000 real mah. Well worth it, also they came with every connector. If you're in the US, you could probably order one.

 

[xSauronx]

something like this would do it:

http://www.amazon.com/Duracell-Insta...usb+power+pack


do price checking and check the mah rating on whatever you are looking at.

 

[Charles Kozierok]

Thanks for the replies.

Spoooon, that device looks interesting but costs twice as much as my MP3 player.

Sauron, I did see that unit and am thinking about it. But I really prefer something that runs on AA batteries rather than yet another internal battery I have to remember to keep charged (I always have AA NiMHs in a charger...)