From: Bruce Beattie (bruce@eecs.berkeley.edu)
Date: Tue Apr 29 2003 - 20:01:43 PDT
Thanks Tom,
I am assuming that you are using your batteries in series, or did the
article talk about batteries that were charged in parallel as well?
Also curious if anyone knows of some good technical sources on the theory of
battery
chemistry?
Bruce
Thomas M McHugh wrote:
> If you study the theory of batteries, you will find that paired batteries
> react to the level or power of the weakest battery.
>
> When you buy a pair of batteries & want the best service, buy a pair from
> the exact same lot. Even batteries made on different days can be a lesser
> than optimum match.
>
> Trailer Life Magazine had a great article a long time ago & repeated it
> again a few years ago.
>
> I will probably jinx myself now, but, the pair of batteries in my travel
> trailer are over 8 years old. Most dealers & battery companies say that
> 3 - 4 years usage is all you will get. OK now I will have to buy
> batteries this year.
>
> Tom McHugh, NJ
> 1952 M38A1
> M-416 Trailer
> MVPA, MTA
>
> ----- Original Message -----
> From: "Bruce Beattie" <bruce@eecs.berkeley.edu>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Tuesday, April 29, 2003 7:58 PM
> Subject: Re: [MV] Mixing batteries
>
> > Ok, I'll bite, Why would it make a difference if you use two different
> > chemistries?
> > As far as I know batteries don't talk to each other, so how on earth can
> they
> > tell if the other battery is different.
> > The electrical load on each battery is going to depend on the application,
> > and in 24 volt settups
> > on CUCV's the loads and charging patterns are radicaly different from what
> I
> > can see. Not that I am
> > a guru about this sort of thing.
> > Bruce MVPA 23824
> >
> > "Employee@MilVeh.com" wrote:
> >
> > > If you are replacing older 6TL batteries with new 6TMF
> > > (or 6TLFP) batteries, it is desirable not to mix 6TL
> > > with 6TMF/6TLFP in the vehicle/equipment. The older
> > > 6TL cases are all green, including the top.
> > >
> > > The newer styles 6TLFP and 6TMF have black tops and a
> > > green case or brown case. The reason is that the
> > > chemistries are different. Bottom line: Its most
> > > desirable to have "black tops with black tops" and
> > > "green tops with green tops."
> > >
> > > If you need to know Army approved NSNs for other types
> > > of batteries, like those needed for communications and
> > > electronics, the Army CECOM-LRC website gives common
> > > use batteries, both commercial and MILSPEC styles, in
> > > their "Preferred Power Sources" listing.
> > >
> > > --- RKubu@aol.com wrote:
> > > > List,
> > > > I know there was a thread recently that covered
> > > > mixing batteries. I cannot locate the messages and
> > > > there is currently no list archive. Is it OK to mix
> > > > 6TLs and 6TMFs? The latter look identical to the
> > > > former and I was told they will work in a 5 ton.
> > > >
> > > > Thanks,
> > > > Bruce
> > > >
> > > >
> > > >
> > > >
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> >
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> >
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