By David Sandoval, Updated Mar 24, 2022
Many electronic devices rely on a standard 9‑V DC supply. When a compact or high‑current solution is required, building a 9‑V pack from smaller cells such as AA, C, or D can be a practical alternative. This guide shows you how to safely assemble a 9‑V battery pack using six AA cells.
Using electrical pliers, twist the black wire from the first battery holder to the red wire of the second holder. Solder the joint, then secure it with vinyl electrical tape to prevent shorting.
Repeat the process: twist the black wire from the second holder to the red wire of the third holder, solder, and tape the connection.
Attach the ring terminals. Slip one terminal over the red wire of the first holder, solder it, then slip the other terminal over the black wire of the third holder and solder. Finally, insert the six AA batteries into their respective holders.
When using alkaline, nickel‑metal‑hydride, or zinc‑carbon cells, the pack delivers 9 V. Rechargeable nickel‑cadmium cells provide only 8.4 V, so check the specification of your batteries before use.
