Battery for PC motherboard

[eeguy]

Hi, if I want to use a Lipo battery to power a PC motherboard which takes 12 to 19 Volt DC with a maximum current of 10A. Should I be using a 3S or 4S Lipo? What capacity and discharge rate should I be looking at if I want to run the PC for about 25 minutes? Given mAh*C of two batteries are similar, should I be choosing one with higher mAh or C value?

[Doctorandus_P]

This does not have much to do with the battery itself.

It's more with the current and voltages that the MoBo actually needs, and the power supply circuitry that you put inbetween the MoBo and the batteries.

Once you have those numbers, do the math with the battery energy you have available to calculate longevity.