A charged battery is a happy battery ... Ultra compact and smartly designed, the GENIUS1 is a 1-amp (15-watt) device that is designed to keep 6-volt and 12-volt batteries going strong.
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 ...
Of course, you also need to ensure that you have all of the features suitable for your needs, such as a good battery ... an 18-volt option and the latter for those who prefer a 12-volt tool.
The whole circuit is built on top of a battery clip so it can be run straight from the top of a standard 9 volt battery. It’s a circuit you’ll find all over the place, even built into many ...