Leaking RTC batteries

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stasheck
Posts: 115
Joined: 15 Jan 2014, 13:13

Leaking RTC batteries

Post by stasheck » 29 Apr 2020, 03:29

I thought I should share: I have a bunch of B3s, and I discovered that in all of them the RTC battery leaked - which may lead to damage to PCB.

You need to open B3, remove the (very small) screw holding PCB, replace the LR44 battery (clean up if it already leaked) and you'll be good to go again.

ahoff
Posts: 98
Joined: 01 Apr 2008, 20:50
Location: Swe

Re: Leaking RTC batteries

Post by ahoff » 29 Apr 2020, 12:47

:shock: :o
Thanks for info.
Åke Hoff
Örskogen
Sweden

Puma
Posts: 230
Joined: 29 Sep 2008, 06:30

Re: Leaking RTC batteries

Post by Puma » 30 Apr 2020, 10:05

clean contacts...
Even better change it for a Silver-oxide (SR44)
Puma
Linux is like a wigwam - no windows, no gates, apache inside!

fredrikj
Posts: 36
Joined: 27 Jul 2011, 12:31

Annual reminder to replace your RTC batteries

Post by fredrikj » 10 Apr 2021, 03:50

April seems like a good month to make the annual "Remember to check your RTC battery"-month, right? :)

I just opened my B3 and found a small mess of dried up powdery stuff from a leak around the RTC battery.

I suppose I can just try it my self, but does anyone know if the B3 works well entirely without a battery, leaving the slot completely empty? I mean except from the obvious RTC not working while powered down. Anything else apart from the RTC that needs the battery? If it isn't required I think I'll just remove it and stop worrying.

BTW, I searched the B3 manual and found no reference to the RTC battery at all. That seems odd, did I miss something?

stasheck
Posts: 115
Joined: 15 Jan 2014, 13:13

Re: Leaking RTC batteries

Post by stasheck » 16 Apr 2021, 04:05

Try it out and let us know :-)

Gordon
Posts: 1403
Joined: 10 Aug 2011, 03:18

Re: Leaking RTC batteries

Post by Gordon » 17 Apr 2021, 03:07

It will work. Only thing that happens is that on reboot the clock will reset to a hardware specific date. I have this on my bubbagen developer machine where the RTC in fact still didn't work any more after replacing the battery. I use a local.d startup script (rclocal in Debian) to set the correct time with ntpdate so except for some log lines generated during startup all is fine.

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