9V batteries are often found in devices that aren’t used very often. If you use a NiCd rechargeable battery you may find it completely discharged by the time you need it. Capacitors on the other ...

Explore how to make a USB rechargeable 9V Li-Ion battery! This simple yet effective DIY project allows you to power your devices with a rechargeable solution, saving money and reducing waste. With ...

It eats through AA batteries by the caseful, so [Brian] wanted to make the switch to rechargeable cells ... both a DC/DC converter to provide the 9V required by the Super Scope, as well as ...