Atari Flashback 2 Portable Help

[Retro_Game_Lover96]

Hey, I am making an Atari Flashback 2 Portable with the cartridge mod. I hooked up with the audio amp, the controls, and the TFT lcd screen, and everything works except for the Lipo rechargeable battery. The FB2 works fine with the regular power plug, but it doesn’t with the LiPo battery which I used was 3.7V 2000mAh, the usb charger port, and the buck converter I have trimmed down to 9V. What am I doing wrong? I need to have the rechargeable battery working on my project. I 3D printed the case I made, so this is the best I can make.

[Wickeycolumbus]

Did I read it correctly, you have a 3.7v battery with a buck regulator set to 9v?  You will need a boost regulator to get a higher voltage output, buck will only get you an output lower than input.  What do you measure on the output?

Edited August 17, 2021 by Wickeycolumbus

[Retro_Game_Lover96]

1 hour ago, Wickeycolumbus said:

Did I read it correctly, you have a 3.7v battery with a buck regulator set to 9v?  You will need a boost regulator to get a higher voltage output, buck will only get you an output lower than input.  What do you measure on the output?

What kind of boost regulator I need for that battery?

[Retro_Game_Lover96]

I found a clever trick I used a 9V battery and the plug from the original AC adapter.