Wanna make 18650 Battery Packs? WATCH THIS FIRST! - YouTube
MAEnt™ 7.4V Li-ion 18650 Lithium ion Rechargeable Battery Pack 2S2P 8.4V Battery Pack for GPS i Pod P sp/DVD/mp4 Tablet PC Drones Project Work Industrial Equipment (4000 mah) : Amazon.in: Electronics
18650 battery and charger kit combo with batteries
Ansmann 1S2P Battery pack 2x 18650 Cable Li-ion 3.7 V 5200 mAh | Conrad.com
Tenergy 18650 6600mAh 3.7V Protected Lithium Ion (Li-ion) Bare Leads Battery - Bulk (31002)
Blue 18650 Rechargeable Battery, Voltage: 3.7 V, Battery Type: Lithium-Ion at Rs 90/piece in Bengaluru