Modeling with Marx HO! Input needed on Converting 9 volts to 4.5, Short Haul model

[Max's Model Railway]

Hello, so recently I bought quite a Marx Train Set I bought it to use for this for this Upcoming Holiday or Christmas Season, I was hoping to operate it with a 9 volt rechargeable battery in the controller, for Improved Efficiency and for longer operation, I was wondering, since the model runs technically off 3 volts as I've had Experience with Electric Motors that run excellently off of 3 volts In O-27 that are also by Marx, I'm wondering how would I drop voltage without loosing current for this 4.5 volt motor and not stressing the motor out? how many of what diodes would I need and of what specific Type --- Thanks!

Edited October 3, 2019 by Max's Model Railway
Changing mistakes made in Topic

[dave_long]

is the battery going in the loco or are you powering the track with it?

 

You could try a nicd 4.5v battery instead. Or a pololu 5v step down regulator.

Edited October 4, 2019 by dave_long