Panasonic Alkaline AAA batteries are specially designed with a power reservoir that enables them to last longer even under the abuse they were likely to take in industry and professional applications. High current and large capacity are standard in all Industrial line batteries, which means high performance and a 7-year shelf life. upper Heavy Duty Power batteries deliver exceptional value for low drain devices. Simple and reliable technology. Economical cost per hour. Ideal for low appliances. Expect reliable power and lasting performance from Panasonic alkaline batteries.