Sencor 6LR61 Alkaline single-use battery.
The high-quality construction is designed so that the batteries can also be used in demanding conditions. They are made to deliver consistently high performance. 9V batteries are mainly used in devices with very low power consumption and higher voltage requirements, such as remote controls for toys, smoke and gas detectors, multimeters, and other home electronics.
They are environmentally friendly as they do not contain cadmium, mercury, or lead and can be stored for up to ten years.
Not rechargeable.