On Wed, Nov 04, 2020 at 09:54:36AM -0800, David Mathog wrote: > > on Mon, 2 Nov 2020 12:31:39 Skylar Thompson wrote: > > > We've had the same problems, one somewhat-effective trick has been to > > scavenge working batteries from systems we're sending to surplus so we have > > our own supply of batteries to swap in. The failure rate is marginally > > better than the batteries we've bought from Amazon/Newegg/eBay (as you > > note, not great). > > Did you try the no name ones too or only the ancient "New" Dell batteries? > Buying those Dells is a bit like purchasing OEM tires for a car with 60k > miles on them - it is the right tire, but... > > Given the amount of iffy stuff floating around on ebay my first thought was > that the Dell ones were probably fakes, but assuming the images are of the > actual battery, why create a "new" product with a decade old time stamp? > > This is yet another one of those situations where a manufacturer's custom > batteries eventually cause grief. From the form factor, voltage, and specs, > these batteries appear to be very similar to a phone lithium ion > battery, but with a different connector. Basically like this: > > https://www.amazon.com/LG-LGIP-520B-Lithium-Phone-Battery/dp/B0015A4TQK/ref=sr_1_4?dchild=1&keywords=3.7v+lithium+ion+battery&qid=1604510929 > > The NU209 has a 5 pin connector, and the card can identify the battery. > There must be some electronics in there (besides +,-, and Thermistor pins, > although there could be two or more ground pins.)
These were all the ancient "like-new brand-name" Dell batteries, figure I don't want to be the one that sets off the FM200 when the really dodgy battery catches fire... For a lot of our nodes, the local disks see very limited use so we have some nodes that just don't have write-cache enabled on their local disks. In other cases, it's the nail in the coffin that lets us actually justify hardware retirement with a lab. -- Skylar _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit https://beowulf.org/cgi-bin/mailman/listinfo/beowulf
