9 volt battery projects

Here's a great tip that could come in handy. This video explains how to charge a cell phone with a car charger, a house key, and a 9 volt battery.

9 Volt Battery Secret Compartment: im sure everyone has tons of dead batteries lying around their homes. for this simple instructable all you need is a 9volt battery, and some basic tools that everyone has. Like an X-Acto knife, pliers and files. just a warning that their are a few …

How to Get Free 18650 Batteries: Getting your hands on good quality, free 18650 lithium ion batteries is surprisingly very easy if you know where to look. The first thing though is we should talk about what exactly is a 18650 li-ion battery and why you need them in your life. Let…

Building a "Baghdad Battery": The intent of this instructable is to provide ideas for experimenting with battery chemistry in general, and to summarize my experience producing a replica of what is often referred to as the Baghdad Battery. In my version of a replica I argue the a…

Have you ever wanted to broadcast your own radio station within the neighborhood? Ever get curious on where people get those "Surveillance Bugs" from spy and

Rediscover the secrets of a 100 year old “green” battery whose time may finally have come.

DIY 9 Volt Battery Connector for Free: Usually cheap 9 volt battery connectors that you can buy are flimsy and don't last for long. Here is a way to make yourself a battery terminal that will last. Oh, did I mention it's almost free? You will need: * dead 9 volt battery * pliers * shar…

DIY 12 volt Portable Battery Pack at home - a simple invention

If only there was a cheap and simple way to supplement a solar panel array on those cloudy days.

My 2.4kWh powerwall is finally complete! Printing the holders took a long time to do, and I thankfully had a friend help out with the printing. I had to print out almost 100 holders, using just over a full roll of filament. Then came the brunt of the work – making over 1500 solder connections […]