Battery Holder – 4xAA to Barrel Jack Connector
This is a simple 4 cell AA battery holder. The 5-inch cable is terminated with a standard 5.5×2.1mm, center-positive barrel jack connector.
The Barrel Jack connector mates with the barrel socket on the Arduino (among a number of other products) allowing you to easily make your project battery powered.
- The average voltage regulator has about 1V of dropout (but can vary greatly). This pack, with normal alkaline batteries, will output ~5.5V causing a normal 5V board to run at around 4 to 4.5V. This depends a lot on the board and processor you are using with the battery pack. Always consult your datasheet if in doubt.