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I just replaced an 11 year old Optima battery that I thought was on it's
way out but it turned out to be the alternator. I used to have lead acid
batteries but they seemed to die after a year or so, I suspect the
vibration was causing internal damage. The new Optima battery was ~$175,
delivered, on line, $60 more than an AGM, glass mat, battery of similar
capacity, that I could get locally. My good luck with the old one was a big
influence in the decision. The "worn" out one is going in a street spit I
own next spring.
mike
On Mon, Sep 16, 2019 at 12:07 AM Ponostyle via Fot <fot@autox.team.net>
wrote:
> If you want to get a seriously good battery then Lithium is the way to go=
.
> Unfortunately there are several issues that make that decision a little
> tricky. If the car is going to charge the battery instead of running it
> total loss and charging in the pits, then you have to accept certain
> limitations in the battery=E2=80=94like it might die fairly quickly. Most=
people
> don=E2=80=99t want to rewire their car to accommodate a lithium battery, =
so even
> the eye-wateringly expensive (a thousand bucks and up) are designed with =
a
> simplified BMS system that protects from overcharging by disconnecting th=
e
> battery. If your electric system can live with that, then you might as we=
ll
> buy one of the cheaper ones ($150-ish) and see how it goes. The best way =
to
> manage a lithium battery is to keep it connected to the car but disable
> charging when the cells reach about 95% charge, and disconnect the batter=
y
> entirely if the cell voltage gets to 20 percent or so. If you do that the
> battery will outlast the car. If you don=E2=80=99t, it might die the firs=
t time you
> overcharge or completely drain the battery. Any battery with an internal
> BMS and just two terminals can=E2=80=99t just shut off charging.
>
> Lead acid batteries respond to overcharging by going into electrolysis an=
d
> generating oxygen and hydrogen. Nothing terrible happens unless it goes o=
n
> too long without adding water, or you manage to catch the hydrogen/oxygen
> mixture on fire, in which case it turns back into water and disassembles
> the battery.
>
> Unless you are prepared to build your own battery from a box full of LiFe
> cells, add your own BMS and control charging I suspect you should get an
> AGM and be happy. Optimas are not all that special.
>
> On Sep 15, 2019, at 8:38 PM, Nick Black via Fot <fot@autox.team.net>
> wrote:
>
> Its time for some new electrons in the Duke of Oil (TR4A as named by
> Hardy's wife Ellie) and there should be something better than a heavy ole
> wetcell type. I know some of the Optima batts are popular, but what is th=
e
> flavour du jour? And will it need some sort of special charger?
> OR
> Should I just go get another wetcell type?
>
> Thoughts and considerations?
>
> Outta juice here in NorCal
> Nick
> _______________________________________________
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>
> http://www.fot-racing.com
>
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>
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>
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>
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<div dir=3D"ltr">I just replaced an 11 year old Optima battery that I thoug=
ht was on it's way out but it turned out to be the alternator. I used t=
o have lead acid batteries but they seemed to die after a year or so, I sus=
pect the vibration was causing internal damage. The new Optima battery was =
~$175, delivered, on line, $60 more than an AGM, glass mat, battery of simi=
lar capacity, that I could get locally. My good luck with the old one was a=
big influence in the decision. The "worn" out one is going in a =
street spit I own next spring.<div><br></div><div>mike=C2=A0</div></div><br=
><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, S=
ep 16, 2019 at 12:07 AM Ponostyle via Fot <<a href=3D"mailto:fot@autox.t=
eam.net">fot@autox.team.net</a>> wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex"><div style=3D"overflow-wrap: break-word;"><div s=
tyle=3D"overflow-wrap: break-word;"><div style=3D"overflow-wrap: break-word=
;">If you want to get a seriously good battery then Lithium is the way to g=
o. Unfortunately there are several issues that make that decision a little =
tricky. If the car is going to charge the battery instead of running it tot=
al loss and charging in the pits, then you have to accept certain limitatio=
ns in the battery=E2=80=94like it might die fairly quickly. Most people don=
=E2=80=99t want to rewire their car to accommodate a lithium battery, so ev=
en the eye-wateringly expensive (a thousand bucks and up) are designed with=
a simplified BMS system that protects from overcharging by disconnecting t=
he battery. If your electric system can live with that, then you might as w=
ell buy one of the cheaper ones ($150-ish) and see how it goes. The best wa=
y to manage a lithium battery is to keep it connected to the car but disabl=
e charging when the cells reach about 95% charge, and disconnect the batter=
y entirely if the cell voltage gets to 20 percent or so. If you do that the=
battery will outlast the car. If you don=E2=80=99t, it might die the first=
time you overcharge or completely drain the battery. Any battery with an i=
nternal BMS and just two terminals can=E2=80=99t just shut off charging.=C2=
=A0<div><br><div>Lead acid batteries respond to overcharging by going into =
electrolysis and generating oxygen and hydrogen. Nothing terrible happens u=
nless it goes on too long without adding water, or you manage to catch the =
hydrogen/oxygen mixture on fire, in which case it turns back into water and=
disassembles the battery.=C2=A0<br><div><br></div><div>Unless you are prep=
ared to build your own battery from a box full of LiFe cells, add your own =
BMS and control charging I suspect you should get an AGM and be happy. Opti=
mas are not all that special.=C2=A0<br><div><br><blockquote type=3D"cite"><=
div>On Sep 15, 2019, at 8:38 PM, Nick Black via Fot <<a href=3D"mailto:f=
ot@autox.team.net" target=3D"_blank">fot@autox.team.net</a>> wrote:</div=
><br class=3D"gmail-m_240961786353080307Apple-interchange-newline"><div><di=
v><div class=3D"gmail-m_240961786353080307yahoo-style-wrap" style=3D"font-f=
amily:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"=
><div dir=3D"ltr">Its time for some new electrons in the Duke of Oil (TR4A =
as named by Hardy's wife Ellie) and there should be something better th=
an a heavy ole wetcell type. I know some of the Optima batts are popular, b=
ut what is the flavour du jour? And will it need some sort of special charg=
er?</div><div dir=3D"ltr">OR<br>Should I just go get another wetcell type?<=
/div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Thoughts and consideration=
s?</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Outta juice here in Nor=
Cal</div><div dir=3D"ltr">Nick</div></div></div>___________________________=
____________________<br><a href=3D"mailto:fot@autox.team.net"; target=3D"_bl=
ank">fot@autox.team.net</a><br><br><a href=3D"http://www.fot-racing.com/"; t=
arget=3D"_blank">http://www.fot-racing.com</a><br><br>Donate: <a href=3D"ht=
tp://www.team.net/donate.html" target=3D"_blank">http://www.team.net/donate=
.html</a><br>Archive: <a href=3D"http://autox.team.net/archive"; target=3D"_=
blank">http://autox.team.net/archive</a> <a href=3D"http://www.team.net/pip=
ermail/fot" target=3D"_blank">http://www.team.net/pipermail/fot</a><br>Unsu=
bscribe/Manage: <a href=3D"http://autox.team.net/mailman/options/fot/bill@p=
onostyle.com" target=3D"_blank">http://autox.team.net/mailman/options/fot/b=
ill@ponostyle.com</a><br><br><br></div></blockquote></div><br></div></div><=
/div></div></div></div>_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot@autox.team.net<=
/a><br>
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<br>
</blockquote></div>
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