Alkaline 9V Batteries

9V batteries are commonly used in devices like smoke detectors, guitar pedals, radios, medical equipment, and certain toys. They're also used in some handheld testing tools and alarms.

Yes, there are rechargeable 9V batteries, typically made from nickel-metal hydride (NiMH). These can be used multiple times and are more environmentally friendly compared to disposable 9V batteries.

The lifespan of a 9V battery depends on the type and the device it's powering. Alkaline 9V batteries can last several months in low-drain devices, but in high-drain devices, they may need to be replaced sooner.

9V batteries should not be thrown away in regular rubbish due to environmental concerns. Many local authorities offer battery recycling schemes, so it's best to drop them off at designated recycling points.