You can dismantle the battery using pliers or screwdrivers. The dismantled parts of a 9V battery are shown in Fig. 7. Fig. 6: Top and bottom portions of battery Fig. 7: Dismantled parts of 9V battery.

You can also use a 9V battery to power the Arduino Uno, with the help of a snap-in connector with a DC Barrel Jack. ... you can directly connect a 9V 6F22 battery to the Arduino through the barrel ...

After successfully testing the AT commands, just remove all the connections and connect it as per the schematics below. Use the Adapter or a 9V battery to power the Arduino. After this, go to the ...

You can also go the 9v battery route plugged into the on-board regulator of the Arduino but the low mAh rating of a 9v won’t allow your project to stay running for very long.

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