I'd like to know more about the technology, how it works, and how accurate it is.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Feb 7, 2017 6:45 PM, "Frederick G Street via CnC-List" < cnc-list@cnc-list.com> wrote: > I think I’ll stick with my Midtronics conductive tester; good, accurate > results on the health of my golf-cart and start batteries, it only takes a > minute, and no chance of starting things on fire… :^) > > Fred Street -- Minneapolis > S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( > > On Feb 7, 2017, at 4:52 PM, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > There is no need to go full discharge. The voltage and capacity > properties of a lead-acid battery have a near linear relationship so a 50% > discharge is fine for testing. That should be 11.6v. All of this is just > a comparison. A brand new battery might show +/- 10% of the labeled > rating. That doesn't mean that you got a good or bad battery. It's just > an indication of how difficult it is to accurately measure the capacity. > Typically batteries are only considered at their end of life until they > only test at 50% of original labeled capacity. Capacity tests really are > most powerful as a trending and comparison measurement rather than a > go/no-go. I've successfully used 100Ah batteries that measured at only > 7Ah. I know they are junk but keep them around for various workbench > projects. I've even used them to successfully start my spare marine diesel > sitting in the garage. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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