Never mind. I calculated that the tablet will draw probably around 1500mA. (600 for the screen, 600 for the Pi, 150 for each dongle). I suppose I'll have to go with a 5V 2A battery pack. Suggestions for battery packs are still very welcome, though.

Hello all! I have plans to put together a sort of tablet using the Raspberry Pi 2 Model B and I have some questions concerning power consumption. I plan to use a 7-inch non-touchscreen usb-powered display from Adafruit that draws 600mA. I also need to power a wifi dongle and a wireless mouse/keyboar...