Specifications: Size: 9Â V Chemistry: Lithium Battery Voltage: 9Â V Brand: Energizer Model #: L522Â Operating Temperature: -40? C to 60? C (-40? F to 140? F) Storage temperature: -40? C to 60? C (-40? F to 140? F) Maximum discharge: 1000Â mA, Features: positive temperature coefficient Continuous safety switch (PTC), strong ventilation holes lifespan: 10Â years included Qty: 4Â Features: Reliable useful life durable performance (up to 4Â times more than 9Â V Alkaline) ideal for the following applications: Microphone equipment children's toys, remote controls, camping equipment, power-hungry smoke detectors Note: These are not rechargeable.