I saw that the same size battery with the terminals reversed was much cheaper, so I ordered one and mounted it 180 deg rotated, so the terminals are close to the original location, the negative wire reached easily while I wanted to mount a wireless controlled relay on the positive terminal anyway, because I noticed that my 2013 S never sleeps and can run down the pack with up to 10 miles per day just sitting as there is no sleep hardware. Now I can push a button on a remote, which disconnects the 12V, the car goes dead and when it sits a few weeks it still has the same charge instead of showing 0 miles. Cor.
On Tue, Jul 29, 2025, 4:43 PM Jay Summet via EV <[email protected]> wrote: > Not sure it's the size, it may just be inflation and taxes, as I paid > $263 for a "standard" sized battery for a Nissan Altima in the last month. > > Jay > > On 7/29/25 19:35, Mark Hanson via EV wrote: > > Thanks Phil etc. > > > > Apparently the non-standard size of these 12V lead batteries is very > > expensive. Advance Auto just charged me $269 for each battery, 2020 Bolt > > (Delco 9943 or H4xEV) and 2021 Tesla-Y (B24XEV), almost $600 total with > tax! > > Amazon wasn't much better, about $220ea. > > > > Lead has doubled in price in the past few years, shipping costs too > (since > > lead is heavy and diesel is expensive). > > > > > > Have a renewable energy day, > > > > Mark > > > > Mark E. Hanson > > 184 Vista Lane > > Fincastle, VA 24090 > > 540-473-1248 phone & FAX, 540-816-0812 cell > > REEVA: community service RE & EV project club > > Website: www.REEVAdiy.org (See Project Gallery) > > UL Certified PV Installer > > My RE&EV Circuits: www.EVDL.org/lib/mh > > REEVA Demo: http://youtu.be/4kqWn2H-rA0 > > Fincastle Solar Weather Station > > > > > > > > > > Date: Tue, 29 Jul 2025 10:50:08 -0700 > > From: "(-Phil-)" <[email protected]> > > To: Electric Vehicle Discussion List <[email protected]> > > Subject: Re: [EVDL] Changing 12V Aux batteries in EVs intervals > > Message-ID: > > <CAHenfdp_A19ttosPkeQer2iFhB8EdZM45dzigez9KDZs6= > [email protected]> > > Content-Type: text/plain; charset="utf-8" > > > > 4 years is about the expected lifetime on average. The big problem with > EV > > 12v batteries is unless they have a system to detect low capacity, one > day > > you are just stuck, and usually in a bad time/place in the middle of > > bad weather. On ICE cars you get a warning when it starts to crank > slow, > > no such warning on an EV, so it's up to internal metrology, or it's just > > dead one morning. > > > > I'd say once it gets past the 4 year mark, it's worth replacing just for > > peace of mind unless you have a way to test it. (Such as what Teslas do) > > > > On Tue, Jul 29, 2025 at 10:45?AM Jay Summet via EV <[email protected]> > > wrote: > > > >> Our leaf is a daily driver in Florida so 80-90 degree weather in the > >> summer. You can see a photo of the failed battery here: > >> > >> > >> https://www.summet.com/blog/2019/05/03/nissan-leaf-12-volt-accessory-b > >> attery-replacement/ > >> > >> It had blue crystals forming around the top of one of the terminals, > >> so was definitely outguessing / leaking under pressure. > >> > >> Jay > >> > >> On 7/29/25 13:27, Lee Hart via EV wrote: > >>>> I would not be surprised if it is almost dead. 5 years appears to > >>>> be about the standard runtime for most car accessory batteries. > >>>> [I've had the one in my Leaf and a Nissan Altima both die around > >>>> that timeframe..] > >>> > >>> > >>> Interesting. Maybe it has something to do with the quality of the > >> battery, the climate where you live, or how often you use the vehicle? > >>> > >>> Our 2013 Leaf and 2014 Prius Plug-in still have their original 12v > >> batteries. The original 12v battery in our 2001 Prius didn't get > >> replaced until 2012, and the replacement is still working. My 2010 > >> Chevy Colorado pickup had the battery replaced in 2018, and is still > >> running on the replacement. > >>> > >>> The Leaf is a daily driver. The two Prius aren't driven often, but > >>> both > >> have roughly 1 foot square PV panels to charge them so the battery > >> doesn't go dead from sitting. Since the pickup is rarely driven, I > >> have a Battery Tender on it to keep it charged. > >>> > > > > _______________________________________________ > > Address messages to [email protected] > > No other addresses in TO and CC fields > > HELP: http://www.evdl.org/help/ > > > > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20250729/f180df62/attachment.htm> _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
