I am very excited to start building an OpenROV soon, I love the idea and can't stop thinking of all the cool things that I could do with it.
However I am trying to plan my build ahead and the battery options seems a bit unclear to me (I am considering a different battery type because the shipping price to europe of the recommended ones is very expensive -I think-)
I see that the currently recommended batteries are the 3.2V LiFePO4 3300mAH.
3 per tube = 9.6V connected in paralell with the other tube.
The older, TrustFire Li-Ionbattery are 3.7V
3 per tube = 11.1V connected in paralell with the other tube.
Does this voltage difference have any effect on the ROV? Don't the LEDs and motors need to run on 12V?
I am considering a LiFePO4 3.2V 8AH battery, since this battery is just a more powerful version than the recommended one, can I simply use 3 batteries in 1 tube and only add a counter-weight in the other tube?
Would that work?
Here is a link to the battery I'm considering:
PS: Are there any schematics to the electronics part? i can't seem to find any information and the Wiki page is down.