Single battery to replace this three-AAA battery? : r/batteries
10440 3.7V 320mAh li ion Rechargeable AAA Battery, AAA battery rechargeable AAA battery AAA replacement - Buy China li ion battery on Globalsources.com
2PCS PKCELL AAA Li ion Rechargeable Battery ICR 10440 3.7V 350mAh button top And 18650 battery charger for AA AAA batteries|Replacement Batteries| - AliExpress
Buy 2pcs Plastical Battery Holder Box Case 3 Aaa To 18650 Battery Converter Good Service at affordable prices — free shipping, real reviews with photos — Joom
Buy 2pcs Plastical Battery Holder Box Case 3 Aaa To 18650 Battery Converter Good Service at affordable prices — free shipping, real reviews with photos — Joom
2x 3-aaa battery holder cylindrical case plastic for 18650 7/8" flashlight round - Walmart.com
AAA Battery To 18650 Cell, Flashlight Conversion / Mod / Upgrade / DIY Project - YouTube
5V 3A Type-C Fast Charging Module For 1S 4.2V 4.35V 18650 Lithium Li-ion Battery | eBay
Everything You Need to Know About the 18650 Battery