I am currently building a line-following robot for a competition this summer. I have figured out everything except the power.
I expect my robot to draw 7.5 amps in the worst case. now, I've selected a 2S LiPo battery for this, as 7.4 volts is enough for my system. However, I am not sure which capacity to select:
- 300 mAh is more compact, but gives about 2.5 minutes battery life under full load. The course should be covered by my robot in much less than a minute, so from the first glance it is not a problem. However, the battery will need more recharging.
- 1000 mAh and above give much more battery life, which means more recharging, but they are less compact, which is not particularly good.
I fear that the low-capacity batteries will experience quicker voltage drops, which will decrease performance of the robot. In your poinion, which is the better option regarding the batteries?
Thanks for your time!