Size:4 count Duracell Quantum Alkaline batteries give you a one-of-a-kind Quantum Leap in Power. With a Hi-Density CoreTM technology. And with the exclusive PowerCheckTM feature you can instantly check the power level so you can trust it to work when you need it the most. Duracell Quantum: is our most advanced alkaline battery** Since Duracell is the #1 trusted battery brand, you can count on these batteries in devices such as flashlights, remote control toys, video game controllers and more. Plus, you get a 10-year guarantee (5-year guarantee for 9V) in storage for a battery that gives you peace of mind and long lasting power. Duracell Quantum batteries are available in AA, AAA, C, D and 9V. * See Duracell.com/guarantee https://www.duracell.com/en-us/technology/battery-care-use-and-disposal/ for details. **Based on Hi-Density CoreTM and PowerCheckTM.