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18650 Lithium Ion Battery (3.7V 3000mAh) - X2 Robotics in Canada
18500 Rechargeable Li-ion Battery 1400mAh 3.7V With One Li-ion Multi-function Charger Ship From CA : Amazon.ca: Electronics
4x AA 3.7V ICR14500 800mAh Li-ion Rechargeable Double A Batteries Button Top | eBay