Retrofitting a 1986 Maho MH400E

RotarySMP wrote: But I still have the 6V lead acid batterys removed from the MAHO, so I'll throw them on a charger and see if they have any life still in them, and add a dropping resister to get 5V.

Mark

You can use 4 NiMh batteries as they will give exactly 5V (1.25V each), and they are cheap and rechargeable. I would not recommend recharging them while in use as they require 1.4V each for charging, getting to 5.6V total.
Do not use resistors for voltage regulation on dynamic loads, use 2 diodes in series, it will give a 1.2V voltage drop and be stable enough for what you need.

Thanks for that. I have NiMH AA's. I think I have nominally 800 mAh ones, so they should work for up to an hour.

Cool, I can 3D print the holder:
www.thingiverse.com/thing:456900/files

Nice holders, i need to finish a 3d printer i started several years ago !

You should. They are very helpful.
Mark

At the time i could not think of anything useful to make with it ! Still don't, but i would like to have it finished.

I am not a big fan of plastic stuff, but once you have a 3D printer, you would be suprised at the problems which pop up which it can solve.