MAXELL - ALKALINE BATTERY AA LR6 PACK*100 BATTERIESAA Batteries: Reliable and Versatile Power for Your Most Important Devices AA batteries, also known as double A batteries, are one of the most common and essential power sources for a wide variety of electronic devices. Their standard size and superior energy capacity make them a preferred choice for equipment that requires greater power and longer life. Available in technologies such as alkaline, rechargeable nickel metal hydride (NiMH), and lithium,