On Thu, 4 Jun 2026, Sid Jones via cctalk wrote:
(Coin cell battery is soldered to the PCB and goes
permanently flat in a
couple of days with no NiCad pack fitted... Found this out the hard way!)
Is that a coin battery indeed or a supercap? I have a bunch of devices
dating back to 1990s equipped with supercaps for short-term backup power
that look the same as a coin cell each.
Maciej