Looking for a good battery supplier

[DefectX11]

Anyone know of a good supplier of lithium cells? I'm looking for packs that are flat, not cylindrical. 12v, and medium capacity (1000mA to 5000mA)
So far I'm having trouble finding anything like this on eBay, and I'm not sure what company to really trust.

Yeah, input is greatly appreciated, and thanks!

 

[PRXVII]

Try http://www.batteryspace.com

 

[Aux]

Yeah, everyone here pretty much is on the batteryspace train. Cheap, good quality cells with lots of specs right on the website for ease of selection.

 

[DefectX11]

I like how slim the lithium cells they've got are. I'm a fan of nice, slim cells.