Choosing the right 9V battery

Thread Starter

Juan Andrew Sasongko

Joined Dec 4, 2017
I want to make a portable device that's using a battery, i'm thinking about using 9V battery.
With that single battery I will be using that for 1 hall effect sensor, 1 arduino nano, 1 LCD 1602, 1 op-amp LM324N
Is using a 300mah rechargeable 9v battery good choice? or is there any better choice?


Joined Oct 29, 2009
That namo alone draws 19-24ma from what I am reading. If the LCD is backlit, you might want to design your circuit so the backlight times out after a period.