Q:

Battery selection

I'm making a little robot and I can't find a proper battery for it. I thought about CR2032 but it has a very little max current output. I need a battery that can deliver at least 1600mA and a voltage of at least 6V, being as small as posible. Which can I use?
Edit
The voltage is trivial, I could use more than one battery.

A:

Although it is not clear in the question, the fact you're looking at 'button' cells indicates you're having some space and/or weight restrictions. These are the same restrictions RC (remote control) hobbyists are having with their RC models, drones included.
LiPo (Lithium Polymer) batteries seem to be the standard for such uses because they have incredible capacity and current capabilities for their size/weight. This comes with some disadvantages that could be serious in some cases. LiPo cells can burst in flames or even explode if overcharged or short circuited and they can be permanently damaged if you drain them too much. They also need special chargers.
Another alternative is Lithium Ion batteries. The type used in cell phones and laptops. I haven't read up on them so I can't say anything with certainty but I'm under the impression that they are slightly safer than LiPos.

