Epson QX-10, battery removal

Paul Koning paulkoning at
Sun Jul 17 14:37:46 CDT 2016

> On Jul 17, 2016, at 3:29 PM, Terry Stewart <terry at> wrote:
> Hi Jules
> I found removing my QX-10's battery stopped the machines working.  I tried
> replacing it with a lithium battery after disabling the recharging circuit
> but that didn't work either.

In the early days of amateur radio transmitters with embedded microprocessors, some idiot manufacturers put the firmware (all of it) in battery backed RAM.  So if the battery went dead, you had a boat anchor, not a radio.

I hope that sort of thing isn't what you're dealing with here...


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