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 ...

Take a small ball of steel wool (say 20 grammes ... heatproof surface. Holding the 9V battery, lightly brush the terminals against any part of the steel wool, then take the battery and your ...

The adhesive can be debonded by 'hotwiring' a 9V battery to the device ... glue from any device with this application by using a small amount of current, with the iPhone 16 being the first ...