As the title implies, I'm looking to make a battery pack here soon. I have the needed voltage and amperage all lined up, and plan to be using NiMH batteries (either RC battery packs or just some basic AA). But, as the main question ask, I would love to be able to use the battery pack as it is being charged. I'm looking to make a laptop of sorts with a raspberry pi, and would love the battery to act like that of a laptop.Thanks in advance!
Just use a pair of diodes with the cathodes (band end) to the power regulator for the Pi, one of the diode anodes going to the battery pack output, the other to the charger input jack, which also goes to your charge regulator.
