"MikeB (Look At End Of Message For Real Address)" <blackhole@abuse.plus.com>
wrote in message news:m8gmo215hdeljn0len1i54e36mg1q4ekkl@4ax.com...
> I'm still using ye olde Sony CMD-Z7 on a regular basis and have been
> for years. Yeah, I know, it's long since been obsolete and all that
> but I happen to like it ! I've no real desire to change it but I'm
> now having more than a few problems getting a half-decent replacement
> battery for it unfortunately.
>
> The original Sony battery still works just fine in all respects other
> than not holding a charge for more than a few hours now. Providing
> that the battery doesn't expire completely, all settings and the clock
> are maintained even if the phone is turned off and the phone works
> perfectly.
>
> Every replacement battery I have ever bought up until recently has
> resulted in a minor problem where the clock and some settings are lost
> if the phone is switched off. Other than that they work reasonably
> well if the phone is always left switched on but generally have a much
> reduced life compared to the original. I believe the problem is that
> they are usually a slightly lower voltage design than the original
> (3.6V rather than 3.9V) and are therefore over-charged plus the
> RTC/memory voltage is most definitely significantly lower at around
> 3.3V max rather than 3.9V
>
> However, the latest replacement I have just bought is blatantly faulty
> and/or not compatible at all because the RTC/memory supply is not even
> on the right terminals ! Therefore the clock doesn't work at all
> because it simply can't be set and any other settings stored in the
> RTC memory are not retained under any circumstances either because
> it's not even powered. Other buyers have experienced exactly the same
> problem so it's not a problem with the phone or a one-off battery
> fault and everything still works just fine with the original battery
> fitted of course. Needless to say it's gone back.
>
> So ... anyone still got one of these old things in use and can
> recommend a supplier of a truly compatible battery that works exactly
> as it should ? Thanks for any help (hopefully) coming
>
> --
> Mike
> email: mikeb <at> twowheels <dot> plus <dot> com
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Hi Mike


I also still use my Sony Z7, excellent little phone. As for the battery
issue, exactly the same thing happened to me.

I bought a compatible 'Sony' battery, only I have then re-set time and date,
then it appears to work OK, with the original battery there is no problems.

I (always) suspected that 2 of the 4 battery terminals were not live?

Brian (Huddersfield)