Epson QX-10, battery removal

Terry Stewart terry at
Sun Jul 17 20:09:14 CDT 2016

>But it is distressing that you're not able to get yours to start again!

No, that's not the case fortunately.  It would only not start with the new
battery and the recharging circuit disabled.  I soldered the old battery
back in and reconfiguring the charging circuit back to what it was.  It
works fine now.  It's just (1) the battery is old and I'm worried about it
leaking at some stage and (2) I'd rather have something in there that is
not rechargeable.  I don't use the machine often enough for the battery to
remain charged (especially a battery as old as this one) and I have to
re-enter the CMOS parameters each time I drag it out. (:


Terry (Tez)

On Mon, Jul 18, 2016 at 9:52 AM, Hagstrom, Paul <hagstrom at> wrote:

> > On Jul 17, 2016, at 4:57 PM, Terry Stewart <terry at>
> wrote:
> >
> >> Anyone here successfully replaced the battery?
> >
> > Hi Paul,
> >
> > As I mentioned, I did try a standard Lithium battery after disabling the
> > recharging circuit. The machine just would not fire up boot.  I haven't
> > tried a NiMH or Lithium ion rechargeable though.  I'd be interested to
> know
> > if these work.
> >
> > Terry (Tez)
> Yes, I wasn't including that within my intended definition of
> "successfully."  :)  I didn't see much in the SAMS book or in the
> operations manual, except indications that the battery preserves 2K of CMOS
> RAM, and that you should take it to the dealer to have the battery replaced
> when it is getting low and losing track of the time (so they can back up
> the CMOS RAM for you).  There did not seem to be any dire warnings about
> crucial parameters or firmware being lost, and there was another section
> that indicated that the battery should be disconnected when taking part of
> it apart, so it seems like it shouldn't have unrecoverable consequences.
> But it is distressing that you're not able to get yours to start again!
> I'm hoping that someone here will know a secret that we don't yet know.
>  -Paul

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