DC power supply

I'd like to get some kind of AC-powered DC power supply so I can run my peak
chargers around the house and shop without lugging the darn trolling motor
battery around... =:-0

I've read lots of posts about cheap DC power supplies but can't seem to find
anything. Googling turns up lots of pricey lab equipement or low-amperage
units for powering computers.

Can anyone point me to a web-order source of affordable (read: cheap) power
supplies suitable for my application?

Thanks for any tips,
desmobob




.

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