Can I run a device that requires 4.5 volts with a 9 volt battery? If not, how can I step down? - Quora
![how to reduce the current without changing voltage for charging a 9 v battery - Electrical Engineering Stack Exchange how to reduce the current without changing voltage for charging a 9 v battery - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/xFmv1.png)
how to reduce the current without changing voltage for charging a 9 v battery - Electrical Engineering Stack Exchange
![A simple 9 Volt 2 Amp Power supply Schematic Circuits: Transformerless Power Supply Circuit Schematic - Schematic Circuits Elektropage.com A simple 9 Volt 2 Amp Power supply Schematic Circuits: Transformerless Power Supply Circuit Schematic - Schematic Circuits Elektropage.com](https://www.elektropage.com/images/circuits/Power_supply_9v2a.gif)
A simple 9 Volt 2 Amp Power supply Schematic Circuits: Transformerless Power Supply Circuit Schematic - Schematic Circuits Elektropage.com
![I have a 9V battery, but I only need to output 4.5V from it. How do I accomplish this? - Electrical Engineering Stack Exchange I have a 9V battery, but I only need to output 4.5V from it. How do I accomplish this? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/PrLBC.png)