This 3000mah battery is small, light and durable. Through standard JST 2mm female connector, it will yield 3.7V which will supply your projects.
Ultrafire-18650-3-7v-3000mAh-Li-Ion-Flashlight-Battery
EBL 18J Battery - 3.7V lithium batteries(SIZE: 18.5MM x 70MM, battery type: button top),fit for flashlight, toys, headlamps and other household
EBL 3.7V Li-ion Rechargeable Batteries 3000mAh 18J Rechargeable USB Lithium Battery for Flashlights, Headlamps, Doorbells, RC Cars (2 Pack)
18650 3.7V 3000mAh Rechargeable Lithium Ion Battery Packs
1-Pair UltraFire TR 18650 3000mAh 3.7V Rechargeable Li-Ion Battery Without PCB
Buy Wholesale China Sujor High Rate Lithium Ion Battery 18650 3000mah 3.7v Lithium Battery For Power Tool & 18650 Battery at USD 2.52
3.7V Spare & Replacement Rechargeable Battery for Electronics 2400mAh
2PCS 3000mAh/3.7v 18650 Rechargeable Battery Flat Top for Power tools Flashlights Camera Drone Headlamps and more
High quality rechargeable 3.7V 3000 mAh 18650 lithium battery Li-ion batteries. With XH 2.54mm connecting plug, can be attached directly or added to a specific plug for different applications. Over-voltage, over-current, over-charge, and short circuit protection battery with best wire length for the space.
3.7V 3000mAh 18650 Li-Ion Battery XH 2.54mm 2Pin Connector for RC Boot DIY Power Bank
Lithium Battery Factory Wholesale UL Certified Battery for Smart Water Bottle UFX 105050 3000mAh 3.7V KC Certification Polymer Li-ion Battery