Threaded Mode | Linear Mode

Mark · (This post was last modified: 03-24-2023 01:17 PM by Mark.)

Hi,

Here's an alternative to the original charger, successfully tested on a TI-58 :

You can safely power it without batteries, by connecting a regulated 5V DC source to the charger terminals.
Either polarity will work : The 1.2V dropout induced by the built-in bridge rectifier will result in 3.8V on the battery terminals, the 200mV increase versus the nominal 3.6V won't harm anything as far as I know.

That should also work for the SR-56 which includes the same bridge rectifier (not sure about the other models).

Regards,
Marc