On Sat, Nov 30, 2024, at 8:55 PM, Dan Langille via Nut-upsuser wrote: > > On Sat, Nov 30, 2024, at 8:16 PM, Simon Wilson wrote: >> >> >> >> >> >> >> On Sunday, December 01, 2024 05:58 AEST, Dan Langille via Nut-upsuser >> <[email protected]> wrote: >> >> >> >> >>> >>> >>> On Fri, Nov 29, 2024, at 3:35 PM, Dan Langille via Nut-upsuser wrote: >>> > On Wed, Nov 27, 2024, at 10:56 AM, Greg Troxel via Nut-upsuser wrote: >>> >> Dan Langille via Nut-upsuser <[email protected]> >>> >> writes: >>> >> >>> >>>> On the website, they say 5.73 pounds (5 lbs 11.6 oz). >>> >>>> >>> >>>> Two of the batteries were 5 lbs 11 oz. The rest were all 10, 9, or 8 >>> >>>> oz. >>> >>>> >>> >>>> See my bar chart at https://bsd.network/web/@dvl/113555334752647203 >>> >>> >>> >>> The batteries are all within 3% of the expected weight. Seems good >>> >>> enough for me. >>> >>> >>> >>> I gave some thought as to how to distribute those 16x batteries within >>> >>> the UPS (4x) and the external battery unit (12x). >>> >>> >>> >>> In the following, I'm omitting the 5lb part of the weight and mention >>> >>> only the ounces. >>> >>> >>> >>> Not that I think it will make much difference, but I'll put all the >>> >>> four equal batteries into the UPS (4x 10oz batteries). >>> >>> >>> >>> That will leave the following for the external pack: >>> >>> ' >>> >>> * 2 x 11 >>> >>> * 1 x 10 >>> >>> * 7 x 9 >>> >>> * 2 x 8 >>> >>> >>> >>> The other choice I'd make: put 2 x 11 and 2 x 10 in the UPS, leaving >>> >>> the external battery >>> >>> unit with: >>> >>> >>> >>> * 3 x 10 >>> >>> * 7 x 9 >>> >>> * 2 x 8 >>> >>> >>> >>> I don't know enough to know if this matters and I expect I'm merely >>> >>> overthinking this. >>> >> >>> >> You are definitely overthinking it :-) Perhaps you've previously been >>> >> diagnosed as a nerd! >>> > >>> > Possibly. I also have a rain-barrel project underway, and I know I'm >>> > overthinking that one too. >>> > >>> >> But, I would either put the 4 strongest in the UPS, or the 4 weakest, >>> >> making the external pack better, since it is more important. >>> >> >>> >> I would suggest that you get a West Mountain CBA, if you want to >>> >> continue to overthink this. We are assuming that more lead is more >>> >> capacity, but there are also weak cells, not clearly related to missing >>> >> lead. What really matters, IMHO, is how many Ah one can pull out of >>> >> the battery, and measuring that directly seems more direct. >>> > >>> > I understand, and no, I'm done with this stage of the process. I don't >>> > want >>> > to geek out any further. >>> > >>> > So far, every battery has been charged. Each took about 30 minutes. When >>> > charged >>> > they measured about 13.3-13.5V. The first batteries I charged are now at >>> > about >>> > 12.9-13.1V - one was 12.8V >>> > >>> > They're sitting in a room that is about 63F. >>> > >>> > My next step is to pull the main battery from the 5PX and replace those >>> > units. However, >>> > it's 3:30 PM and I'd rather start such a project earlier in the day >>> > should >>> > thing take longer than expected. >>> > >>> > One server has a drive ready to be replaced and two drives are to be >>> > relocated from the drive bays at the front to PCI slots in the rear of >>> > the server. >>> > That process is waiting on parts. I was going to wait for those parts >>> > and do the drives >>> > and batteries at the same time. I changed my mind; I'm not going to >>> > wait. Plus, >>> > the batteries may be a big enough job by themselves. I am sure the >>> > Eaton 5PX legacy >>> > is not a hot-swappable unit. I'll power everything down. >>> > >>> >> Thanks for posting about your journey; it has been illuminating to me. >>> > >>> > I'm glad it helps. I write mostly for selfish reasons and encourage >>> > others to do so >>> > too. It helps to know what you did should something go wrong and/or you >>> > want >>> > to repeat the procedure later. If you make your writing public it will >>> > also >>> > help others and I'm thankful of that. >>> >>> The batteries were replace earlier today. Details with photos in the this >>> blog post: >>> >>> https://dan.langille.org/2024/11/30/replacing-batteries-eaton-5px-5px2200rt-5pxebm48rt/ >>> >>> Some tricky bits, especially a metal nut very close to the fuses... A slice >>> of cardboard >>> helped me through that part. >>> >>> BONUS: I ordered four more batteries than I needed (12). This means the UPS >>> in the office, >>> which I'm sure will start screaming for new batteries soon, has a supply >>> already on hand. >> None of the images load for me on that blog - maybe double check that? >> > > Oh I see. It's working fine in Safari. I uploaded .heic images, not the .png > I exported. I won't be able to fix that until tomorrow. Thanks for letting me > know. >
Fixed. Thank you for letting me now. I appreciate it. -- Dan Langille [email protected]
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