I made an external battery pack that holds two D cells and a couple of dummy AAA batteries wired to it so that my venerable 201 could run for (much!) longer.
Using this the Geko 201 turned on OK and it reported fully charged batteries, but after anything from about 60 seconds to two minutes it powered itself off. It did this consistently so I went back to using a pair of AAA cells.
Can someone tell me what would cause this to happen, and if there's a solution so I can run the 201 from external batteries.
Many thanks