So im in the middle of building a hexapod that can record audio and video. Im using an arduino UNO for this project but am questioning how ill power the robot. I was thinking of this battery:
Would this be okay? In the robot is the UNO, an SD card reader, the camera, microphone, bluetooth shield, servos (8 most likely) and a recorder shield.
Also do I need a shield to recharge the battery with? Or would plugging in my UNO into a computer recharge the battery?
You will always need a purpose made LiPo charger with LiPo batteries (and never charge unattended).
Its powerful, but not a lot of capacity.
Also you probably want to power servos separately from the sensitive electronics, or at least
use DC-DC converter to generate a clean 5V from it.
Alas servos typically want 6V, 7.4V is a bit high. A LiFePO4 battery would be 6.6V which
is better (they are a little larger for the same capacity though). And you need the right charger
for those too.
You need to find out the current consumption of each device (and its voltage requirements) and
sum it all up -- you can estimate battery life from this and the capacity (but remember the capacity
you see will be less than the quoted value in real life, especially after some recharge cycles, batteries are
not perfect devices).