Modded PC power supply for charging

[BrianG]

Unfortunately, with switching supplies, you generally get what you pay for. In the field I use a 17A PS and tweaked it for a little higher voltage (~12.5) to help the chargers switching circuit to operate a little better and to allow for more voltage dips under heavy load without going too low. At home, I use a nice Aston 35A supply tweaked to 14.5v, but it was something like $80-90 on eBay.