khayyam 68 Posted February 18, 2021 Share Posted February 18, 2021 I've got some 12v lead acid batteries that were neglected (not by me!) and I'm wondering about reconditioning / desulphating. Not marine, but deep cycle (mobility scooter). Does anyone know of a place on the shore that does this? Quote Link to post Share on other sites
waikiore 399 Posted February 18, 2021 Share Posted February 18, 2021 Best result I have had with old Deep cycles was using a Ctek charger on recon function worked with half of them -which was a bonus as I had been given them. 1 Quote Link to post Share on other sites
khayyam 68 Posted February 18, 2021 Author Share Posted February 18, 2021 16 minutes ago, waikiore said: Best result I have had with old Deep cycles was using a Ctek charger on recon function worked with half of them -which was a bonus as I had been given them. Yeah those look good. I need to beg/borrow/rent one though as buying the charger is almost as expensive as battery replacement... ! Quote Link to post Share on other sites
wheels 543 Posted February 18, 2021 Share Posted February 18, 2021 Pulse charging doesn't work. Nor does adding additves. You may if you are lucky, get a short term gain. The best method is as follows. But firstly a warning. You are working with Acid that will eat clothing. So careful. Wear decent rubber gloves. Wear googles. Have a water hose on standby that you can douse yourself under should you splash any on bare skin. Place down a decent plastic ground sheet. Get a large plastic container that allows you enough room to safely tip the battery upside down. Tip out all the contents. Lots of black muck will come out. Then pour the Acid into a safe container you can screw a lid onto and leave to settle. Pour the black muck into another container and you can take that to the Transfer station and dispose it as toxic waste. Now get the hose and flush the battery cells out with fresh water. Leave to drain. After it has drained, pour the clean Acid back in. Try not to let the dregs that settled get back in the battery. Also add equal amounts to each cell. Top up each cell with distilled water. You shouldn't need any acid. but if you do, you can get clean fresh Acid from a Battery guy. Then charge with a good hard charge and see what happens. Once Sulphate has gone hard, it cannot be turned back to Lead oxide within the plate. Only soft Lead Sulphate can be turned back to Lead Oxide. Usually you can't leave a battery in a low or dry state for long before it is unreversable. The Pulse charging was about knocking the hard Sulphate off the plate. But as the depth of lead Oxide on the plate determines the capacity of the battery, having anything removed only decreases capacity. So the battery will never return to anything like original. You have to weight up if the above exercise is worth doing in regards to the amount of capacity the battery is going to give you. 1 Quote Link to post Share on other sites
MartinRF 53 Posted February 19, 2021 Share Posted February 19, 2021 This guys is testing and repairing battery chargers and some other stuff. He also tests the recon function. Might be of interest: https://www.youtube.com/channel/UCxQND04oRmv_KgEpWjW0-mg /Martin Quote Link to post Share on other sites
CarpeDiem 430 Posted April 17, 2021 Share Posted April 17, 2021 On 19/02/2021 at 9:22 AM, khayyam said: I've got some 12v lead acid batteries that were neglected (not by me!) and I'm wondering about reconditioning / desulphating. Not marine, but deep cycle (mobility scooter). Does anyone know of a place on the shore that does this? Did you ever find someone to do these? I am on the shore and have a 18a CC/CV PSU and an electronic load generator to put them through there paces - assuming it isn't hard sulphation... Quote Link to post Share on other sites
harrytom 642 Posted April 17, 2021 Share Posted April 17, 2021 https://nulifebatteries.co.nz this guy did wonders to my deep cycle brought it back to life for $80 from memory lasted another 3 yrs, Quote Link to post Share on other sites
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