18650 Cell Lithium Ion Battery (3.7V 3000mAh) - X2 Robotics in Canada
18500 li-ion Battery 3.7V 1400Mah ICR18500 Lithium Rechargeable Battery for LED Flashlights 6pcs(They are not 18 * 65mm Size Battery Also not aa Size Battery) : Amazon.ca: Health & Personal Care
Lithium Ion Polymer (LiPo) Battery (3.7V 500mAh) - X2 Robotics in Canada
Lithium-Ion Polymer (LiPo) Battery (3.7V 1000mAh) in Canada Robotix
All you need to know about the 3.7V lithium ion battery-Tycorun Batteries