to be the king of flashlights, but replacing those pesky D-cell batteries is kind of ridiculous in this day and age. So [Travis] decided to upgrade it to make use of the ever-so-common ...

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 ...

Leading Polysilicon Enterprise Officially Announces Production Cut Plan, Multiple Polysilicon Futures Contracts Hit Limit-Up on First Trading Day All-Round Increase on the First Trading Day: ...

I have accumulated a large number of 18650 cells for use in projects like electric bikes, lawnmowers and boat engines. These came from discarded packs and equipment. Charging, testing and restoring to ...