Making a pipad

[Wklaus12]

Im looking to make a pipad i gave found the touchscreen and need w battery to power it for fairly cheap can you help me find one... And is yhat all the part i need besides the case thanks!

[BMS Doug]

There are plenty of replacement laptop batteries for cheap prices on the internet, obviously you want to select one that can be externally charged in some easy fashion. (Seem to be plenty of chargers for laptop batteries too).

What's the minimum voltage needed to run the touchscreen?
Pick a battery with a higher nominal voltage.

What's the total wattage consumed by the pi pad and how what operating duration are you aiming for?
Pick a battery with an ampere hour rating that matches your design.

What weight and form factor do you need?

[Wklaus12]

I dont know how much power i need im guessing a little more than normal to power touch screen?... I saw that the person who made a pipad used one with 11000 milaamps i think

[BMS Doug]

I dont know how much power i need im guessing a little more than normal to power touch screen?... I saw that the person who made a pipad used one with 11000 milaamps i think

Voltage is critical but the ampere hour duration just wants to be as long as you can practicably afford. (Not necessarily financially, weight and form factor also weigh in to the affordability for your pi-pad).

I'm sure you've already designed in a safe shutdown circuit for low battery conditions (and an on/off switch) but if not you'll definitely need one.