RTC Backup Battery Holder CR-2032 Issues
#7
(09-07-2016, 02:41 AM)MarkHaysHarris777 Wrote: As long as we're having this stupid conversation , would you do everyone a favor please , and post pics of the CR2032 battery compartment 'open' with the cells removed ?  Thanks.

I'm sorry that you find the conversation in this thread stupid.  This was not my intent.  I can tell you that I was hesitant to respond to your request for fear of this post continuing to appear so to you.  But since I do believe that posting pictures may further the discussion, I do post pics here.

(09-07-2016, 02:50 AM)pfeerick Wrote:
(09-06-2016, 08:46 PM)steveslim Wrote: If all of this is just nonsense, feel free to just ignore it.  But if anyone has anything to add that might help explain this to this ignorant person, I'd be happy for additional lessons.  Thanks again to you, MarkHaysHarris777.  I do appreciate your post.  It did explain some of the puzzle.

I haven't bought the pine64 battery holder myself, but according to a discussion that was going on over in this thread about the RTC battery holder, it appears that for starters, the battery holder markings are wrong (if they were right, no more instructions would be needed!) In that thread, the guys indicated that the batteries should both be placed in the holder positive (+) side down. There was also mention that if you had dud, or counterfeit batteries, you could get the expected 3v from the battery if you had one + up and one + down.

Unless you can test with a multimeter, it's all just guessing from here in. You could be unlucky and have dud batteries or a mis-wired connector... is the red wire on the same side of both connectors? And is it or the black wire connected to the same place in the two different holders? There is such a thing as positive polarity, and negative polarity (with respect to ground - polarity is only negative or positive with respect to some reference), but you'll encounter mostly positive stuff in everyday electronics. One way you can check the batteries if you have a LED handy is to fit batter between the leads of an led and see if it lights up - if the LED lights up with the long lead on the positive (+) side of the battery, that battery is fine (the polarity is correct and it isn't flat).

Hello pfeerick,

Thank you for the referral to the other thread on this topic.  I did try to search for other threads about the battery holders before opening a new one.  Obviously, I missed it.  Thanks for the advice about the multimeter.  The pics I posted show that the red and black wires ARE connected in the same manner in both holders, so I don't know why the batteries seem to require different orientations in the holders.  Thanks too for the hint about using a LED to test the battery.  The batteries I bought were purchased in a department store, but I suppose that doesn't prevent counterfeits.  So far, I have placed both of the batteries in opposite orientations in one holder.  I was afraid to put them in the same orientation as I thought that would send 6 volts down the circuit (each CR-2032 battery is supposed to be 3 volts when new).

Edit:  I've now seen that the other post suggests putting both CR-2032 cells with ( + ) side down.  I've now done that with both of my Pines, and both RTCs hold the time when disconnected from power and then reconnected.  Thank you for this.

My apologies to you if I still got something wrong.  It isn't intentional.

Thanks for your post.  I appreciate all your helpful hints.


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RE: RTC Backup Battery Holder CR-2032 Issues - by steveslim - 09-07-2016, 10:56 AM

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