Rechargeable lithium battery type 21700, 3.7V 4000mAh
Neoware 3.7 Volt Rechargeable Lithium Ion Cell,Long Lasting High Performance 1800 mAH | 18650 (Its not a AA and AAA Size) (Pack of 3) Battery - Neoware : Flipkart.com
Buy MAENT® 3.7V 1000 mah Actual capcity lipo Li ion Rechargeable Battery Lithium ion Polymer Cell for Bluetooth Science Project Toys MP3 GPS PSP Handheld Device - NOT for RC CAR OR
Lithium Ion Battery - 1Ah - PRT-13813 - SparkFun Electronics
18650 3.7V 1200mAh Lithium-Ion Rechargeable Cell
Li-ion Battery Pack 3.7v / 5200 mAH at Rs 320/piece | Lithium Ion Battery in Bengaluru | ID: 12206262291