NITECORE NL189/NL1834 3400mAh Protected Rechargeable Button Top 3.7V battery
100% Original Nitecore Nl189/nl1834 18650 3400mah 3.7v Li-ion Protected Battery With Button Top For All Type Flashlights 1 Piece - Portable Lighting Accessories - AliExpress
EdisonBright Nitecore HC60 V2 1200 Lumens LED Compact headlamp with NL1834 Rechargeable Battery USB Powered LED Reading Light - - Amazon.com
18650 Nitecore Rechargeable Battery NL1834 3.7v 12.6wh – Battery World