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.)
Thanks,
David Mathog
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