My experience with a shorted cell in a battery has been spotty. The short is not very reliable, for example a good bump of the battery can (and has) removed the short between the plates and allow it to work normally until the plates returned to original position or the short grew a bit longer and shorted again. But the main thing is that charging current is typically an order of magnitude lower than driving, so where the battery may show a shorted cell when charging, as soon as you start driving the short may be overtaxed and dissolve or burn away enough to insert an *uncharged* cell in your string, which means that now they are high resistance and start to be charged in reverse direction. While nothing may happen, this will make the cell HOT and can even lead to destruction of that cell or boiling - sending hot acid out the over-pressure release. Not sure that I want such a ticking timebomb in my pack...
On Thu, Feb 16, 2023 at 9:08 AM Barry Oppenheim via EV <ev@lists.evdl.org> wrote: > > I have three 6V deep cycle batteries, each with a presumed bad cell > (voltage ~4.4V charged). Can I combine them into one 12V battery and > charge with a 12V charger? > > Thanks in advance, > Barry > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20230216/a2972fc6/attachment.htm> > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
