Adafruit 6 x AA battery holder with 5.5mm/2.1mm plug

This portable power brick delivers a reliable energy source with significant capacity. Using Alkaline AA batteries, it offers a 9V, 3000-4000mAh power supply. Alternatively, swap in rechargeable NiMH batteries for a 2000mAh, 7.5V supply.Perfectly suited for electronics equipped with a 5V voltage regulator, this power brick supplies the necessary 7V or more, ensuring seamless operation. Exceptional longevity makes it approximately ten times longer-lasting than a typical 9V battery.It features a 5.5mm outer diameter and 2.1mm inner diameter plug with center positive polarity, ideal for portable Arduinos and other compatible devices. Note: batteries are not included.