Walmart is selling a 'bright' $189 rechargeable flashlight for just $19, and shoppers say ...
If there is one item that every household needs, it's a flashlight. But not your typical battery-powered flashlight that only ...
Hackaday9 年
Prototype Sodium Ion Batteries In 18650 Cells
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 ...