Lithium-ion batteries are one of the most common rechargeable batteries in flashlights and various electronics. 10440 lithium-ion batteries, like all lithium-ion cells, are known for having one of the best energy densities, little-to-no memory effect, and a slow loss of charge when not in use, when compared to other chemistries for rechargeable batteries. These AAA lithium-ion batteries can be used in a variety of applications where standard AAA cells are used. Always double check your device before using a Li-Ion cell in place of other chemistries. BatteryJunction offers these trusty AAA lithium-ion cells at an everyday low price while also offering 10440 batteries in a variety of brands. If you have any questions, or can't find what you're looking for, speak with one of our battery specialists using our live chat feature at the top of your screen, or call 860-767-8888 any week day between 9:00 AM and 5:00 PM Eastern Time!