If you put that "dead" battery on a fixed 14V power supply (current limited) for a *very* long time (it might need days to fully recover) then you probably have a reasonable good battery back. The issue is that a really dead battery does not take much charge current, so even after a jump and driving it for an hour, it might have accepted hardly any current so if you turn it off and try to restart later, it might fail and you need to jump it again. If you have a good old stupid battery tender (trickle charger) or a jump start device that will simply constantly provide 14V as long as plugged in, that can help you to recover this almost new battery. I once bought a battery that was installed in a car that had a bad alternator, so it was run down and then the owner wanted to bring it back so they put their old battery back (which was OK) and fixed the alternator but forgot to return the new battery. It sat for 1/2 year and was really dead, so it would not charge. I put it on a 15V 1/2 Amp limited power supply until it started taking a decent charging current (one whole day later) and then adjusted the supply to 13.8V 10A to charged it fully and I have used that "dead" battery for years in my EV as aux battery.
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 -----Original Message----- From: EV on behalf of harry henderson via EV Sent: Wed 7/15/2015 10:07 PM To: Jamie K; Electric Vehicle Discussion List Subject: Re: [EVDL] adding solar charging to 12 volt battery on LEAF S, like i said, battery was at 4 volts and i had to jump it to start it [my first EV/EV jump] i had to jump it two more times that day then i got a new battery, however, the 'old' battery was only a month old. as another data point, i did need to fill up one tire several times as it had a slow leak, carmax also fixed that, but i might have been using the 12 volt too much? harry Albuquerque, NM current bike: http://www.austinev.org/evalbum/1179 current non-bike: http://evalbum.com/1000 -------------------------------------------- On Wed, 7/15/15, Jamie K via EV <[email protected]> wrote: Subject: Re: [EVDL] adding solar charging to 12 volt battery on LEAF To: "Electric Vehicle Discussion List" <[email protected]> Date: Wednesday, July 15, 2015, 8:12 AM As another data point, so far we haven't noticed any problems with the 12 volt battery in the 2013 LEAF that we bought about a year and a half ago. What model LEAF did you buy? S, SV or SL? What symptoms have you had? Cheers, -Jamie On 7/14/15 10:41 PM, harry henderson via EV wrote: > the 2013 nissan leaf has a known issue with its 12 volt battery > either by lack of charging or vampiric drains, i just got a 2013 leaf > and found my 12 volt battery at 4 something volts a couple weeks > after i got it. carmax replaced it but what they replaced was not > the original battery. the battery they replaced was only a month old > and i don't know how many batteries this 2 year old EV has used in > its 10,000 miles of life. > > i'm considering hooking up a solar charging unit to the battery. > i've been using solar charging systems on my 12 volt systems as their > only power source for 10 years now on my homemade EVs, however, this > is a little different, since it supposed has a DC/DC system. the > options i've pondered include: > > 1. add an unregulated trickle charge [but with diode: 1-2 watts] to > existing battery 2. add a regulated [charge controller: 10-20 watts] > to existing battery 3. add a regulated [charge controller: 10-20 > watts] to a deep cycle [that is larger than existing battery, maybe > about 30% larger] > > #3 is what i've been using very successfully for 10 years, but again > this is different situation, eager for other folk's suggestions > > i realize this might void some or all warranty issues, please don't > respond if that is your only contribution, thanks > > harry > > Albuquerque, NM current bike: http://www.austinev.org/evalbum/1179 > current non-bike: http://evalbum.com/1000 > _______________________________________________ UNSUBSCRIBE: > http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing > discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) > > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/ms-tnef Size: 5168 bytes Desc: not available URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150715/e801ca94/attachment.bin> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
