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2PCS Rechargeable Battery 18650 Flat Top 2200 mAh 3.7V Batteries (the color of the outer of batteries would be random) - Newegg.com
Flat Top 18650 Battery 3200mAh 3.7V And Battery Charger 18650 Batteries Li Ion Battery For Handheld Flashlight Headlight From Jiangyang87, $4.23 | DHgate.Com
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Exell 3.2V 1500mAh Li-FePO4 18650 Rechargeable FLAT TOP Battery For Solar Lights EB-LFP-18650-1500-FLAT | Zoro
Amazon.com: 2pcs 18650 Flat Top 3.7V Rechargeable Battery with Speedy 18650 Battery Charger and Battery Storage Holder Case for Flashlights, Cameras, Headlamps, Doorbells, Handheld Fan, Toys,RC Cars and Others : Cell Phones
Authentic AWT IMR 18650 3000mAh 3.7V 40A High Drain Flat Top Battery
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Amazon.com: 2pcs 18650 Flat Top 3.7V Rechargeable Battery with Speedy 18650 Battery Charger and Battery Storage Holder Case for Flashlights, Cameras, Headlamps, Doorbells, Handheld Fan, Toys,RC Cars and Others : Cell Phones
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Lishen 18650 2600mAh Li-Ion Flat Top Battery 3-Pack