Coin

Image	Part # and datasheet	Voltage	Capacity	Diameter	Distributors
	CR1220	3V lithium	~25mAh	12.5mm	Mouser Digikey
	CR2032	3V lithium	~200-235mAh	20mm	Mouser 200mah ~~Mouser 235mah~~(crossed out due to that part being obsolete)~~Mouser 225mah Digikey~~(this part is actually CR1220, not CR2032)

NiMH