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Fixing the Portobello Police Station Clock

548 points · 116 comments · avidly

  1. IsopropylMalbec · · focus · HN ↗
    The battery on that circuit looks very much like a backup battery we have connected to our house alarm.

    We moved in to the house in 2003 and that battery died this year, so I would imagine that it is already or will very soon die. That said, if it's a backup battery and the electricity supply is stable then it may not make any difference.

    1. js2 · · focus · HN ↗
      It's a standard sealed lead acid battery:

      <a href="https:&#x2F;&#x2F;www.rapidonline.com&#x2F;yuasa-yuvolt-yucel-y1-2-6-valve-regulated-lead-acid-sla-battery-6v-1-2ah-18-5207" rel="nofollow">https:&#x2F;&#x2F;www.rapidonline.com&#x2F;yuasa-yuvolt-yucel-y1-2-6-valve-...

      <a href="https:&#x2F;&#x2F;static.rapidonline.com&#x2F;pdf&#x2F;18-5207_v2.pdf" rel="nofollow">https:&#x2F;&#x2F;static.rapidonline.com&#x2F;pdf&#x2F;18-5207_v2.pdf

      Design spec is up to 5 years. The one in the photo looks like it may have a date written in Sharpie on the side. I don&#x27;t think it&#x27;s 25 years old though. The &quot;090323&quot; on top could be DDMMYY indicating a battery from 2023.

      1. icantevenhold · · focus · HN ↗
        Could also be YYMMDD In most of Europe it would be DDMMYY - but seeing how the English still measure stuff in feet and inches I wouldn’t be surprised if they have some illogical way of structuring the dates as well
        1. card_zero · · focus · HN ↗
          YMD is Sweden or Hungary. MDY is US and pre-1960s UK. YDM is Latvia. DYM and MYD are up for grabs.
          1. icantevenhold · · focus · HN ↗
            YMD and DMY i can understand; MDY is just insane, who came up with that.
            1. mrweasel · · focus · HN ↗
              MDY makes some sense when you pronounce it September 24th, 2026, but yes, it&#x27;s very confusing for everyone else.

              I guess the confusing part is mostly because of an international audience. If everyone used MDY it would feel less weird. Still sorts completely wrong.

          2. abanana · · focus · HN ↗
            &gt; pre-1960s UK

            Where do you get that from? Is this a confusion with dates spoken or written out in full as &quot;March the 9th, 2023&quot;? We&#x27;re talking numeric form here, &quot;090323&quot; in the specific example, and I don&#x27;t think the UK has ever used MDY for numeric forms.

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