I had a charger that charged two sla batteries in a series at 29v and 2.5a. It looks just like a power supply for a laptop or something like that. I accidently fried that so now I need to buy a new one or get something like a pc power supply to work.

wait. Will a car battery charger work? Dang, it probably will. We got one and never used it. I'll look into that.

I am still thinking about getting a pc power supply. I told my dad to look out for an old computer at work and take it home. I hope I can find one!

He needs to update the lithium battery page. Hasn't been changed since 2006. :oh:

yeah, still an interesting read though :p

http://xkcd.com/560/

Heres mine :mdr:

http://i191.photobucket.com/albums/z...3/HPIM1984.jpg

My hyperion 0610i is rated for 250w. If I get a ps rated for 250w, can I expect 20a@12v? 500w = 40a@12v?

Newegg has a lot of cheap power supplies for around $20, or even less. The OP is over 3 years old, and it said a suitable PS would cost about $40. Can these $20 power supplies be trusted?

Maybe this one? - http://www.newegg.com/Product/Produc...82E16817709011

First of all, you want to figure in a typical charger efficiency of ~80%, and then I like to add another 15% as a safety margin. So, that 250w charger will require around 370w. Assuming the PS can deliver a stable 12v, it needs to be rated for at least 31A.

When shopping for supplies, make sure that they don't have multiple 12v rails. What you want is a single high current 12v rail.

No. A huge chunk of the power, especially on older PSUs is on the 5V and 3.3V rails. You want to look at the stats of the PSU and get something with a single 12V rail that can handle a lot of grunt. These also happen to be the most expensive kind :)

Something like this would be good, dunno how much you're willing to spend though. This is the cheapest quality PSU that looks like it will do the job is

http://www.newegg.com/Product/Produc...pk=CMPSU-400CX

Details under 'resources' tab here
http://www.corsair.com/products/cx/default.aspx

30A @12V = 360W seems ample :)

edit: I just noticed the one you linked has the output table in one of the photos. IT is rated for 25A @ 12V, or 300W which seems like it could be OK. That is, of course, inferring from that table that it is a single 12V rail. It is plausible it could have multiple rails, and could be giving a combined 12V power rating.