French researchers have announced a prototype of an 18650 sodium-ion battery. If you’ve bought a powerful LED flashlight, a rechargeable battery pack, or a–ahem–stronger than usual LASER ...

So [Travis] decided to upgrade it to make use of the ever-so-common, 18650 lithium-ion battery. Not looking to purchase any components [Travis] performed this hack using simple recycled household ...

A kit contains two 18650 rechargeable batteries (3.7V, 3400mAh, li-ion, pointed head, no protective board) and a charger (USB powered). Click the green "Clone or download" button, then click "Download ...

In this project, we explore the life cycle of 26 battery packs, each consisting of two 18650 rechargeable lithium-ion batteries. These batteries are integral to various applications, including ...