Ultralife 9 Volt Lithium Battery U9VL, The Premium 9V Battery currently available. The U9VL-FP is a plastic case version of the standard U9VL with a smaller form factor allowing fitment into devices that use 9 volt batteries where the standard U9VL doesn't fit. Ideal for all devices to replace 9V alkaline or carbon batteries. Up to 5 times more powerful than alkaline 9V batteries. Lasts 10 times longer than alkaline batteries in smoke alarms U9VL-FP, U9VLX-BP1 |