They looked a LOT like these https://www.sbsbattery.com/products-services/by-product/batteries/nickel-cadmium-batteries-1/vrpp-series-ni-cad-valve-regulated-pocket-plate.html
On Sep 17, 2018, at 4:47 PM, Rob <Rob@Sail4Life.net> wrote:The only batteries I've *ever* seen that has lasted more than decade is a group of Wet Cell Nickel-Cadmium batteries I saved rom the landfill when we were replacing railroad crossings (they were used to power the lights and arm swing). Energy density was pretty low IIRC, but they were robust as (fill in blank). At least one set was manufactured in the 1970's and we pulled them in 1990. I ran all sorts of charge discharge tests and finally decided they were ok to put in the boat. sold the boat 3 years later, never having touched them again.Note: WET cell Ni-Cd are completely different animals than dry cell ni-cd like you get in el cheapo tools. No memory, full discharge tolerant, over-voltage charging tolerant, etc. IIRC, they were 2v cell, about 14" tall by 3" x 6".-Rob...On Sep 17, 2018, at 4:31 PM, 'james@deny.org' james@deny.org [electricboats] <electricboats@yahoogroups.com> wrote:...
Now these new Lead battery chemistries may fix the long standing reliability issues with Lead batteries, who knows they may last decades. But quite frankly we will have to wait ten years to see, if I start seeing live aboard cruisers regularly getting 10 years from there Lead house banks then I may start to trust Lead batteries again, but I already know for a fact, that LiFePo packs do regularly last 10 year, and are still going strong. Even then I will still harbor some pretty strong fears related to Lead reliability. I have to many years dealing with them professionally inside large data centers, and I was an very early EV adopter from way way back. Both in data centers and in EV's, lithium transformed both UPS's and EV's from nearly useless toys to everyday useful trustworthy reliable devices.
Just my opinion, based on my experience, yours may very.
Posted by: Rob <rob@sail4life.net>
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