E 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. -- Dan Langille [email protected]
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