{"id":1101,"date":"2020-03-22T19:17:44","date_gmt":"2020-03-22T09:17:44","guid":{"rendered":"https:\/\/blog.hegars.com\/?p=1101"},"modified":"2020-03-23T20:19:19","modified_gmt":"2020-03-23T10:19:19","slug":"rejuvenating-dry-sla-batteries","status":"publish","type":"post","link":"https:\/\/blog.hegars.com\/?p=1101","title":{"rendered":"Rejuvenating Dry SLA batteries"},"content":{"rendered":"\n<p>I had some dead 12v 12Ah batteries from an APC smart ups 1000 that were quite old (md 2009) and very dry. I have replaced them with a set of  new 18Ah batteries. I thought I would try my hand at getting these old batteries going again.<\/p>\n\n\n\n<p>One battery was showing ~12 volts but could draw no current what so ever and the other was shown only ~10 volts  <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"976\" height=\"823\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-7.png\" alt=\"\" class=\"wp-image-1102\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-7.png 976w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-7-300x253.png 300w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-7-768x648.png 768w\" sizes=\"(max-width: 976px) 100vw, 976px\" \/><figcaption>Prep: caps off, 10ml syringe and a 22g drawing up needle <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"782\" height=\"996\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-10.png\" alt=\"\" class=\"wp-image-1108\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-10.png 782w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-10-236x300.png 236w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-10-768x978.png 768w\" sizes=\"(max-width: 782px) 100vw, 782px\" \/><figcaption>Pretty thirsty for two batteries <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"793\" height=\"903\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-9.png\" alt=\"\" class=\"wp-image-1105\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-9.png 793w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-9-263x300.png 263w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-9-768x875.png 768w\" sizes=\"(max-width: 793px) 100vw, 793px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"785\" height=\"795\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-8.png\" alt=\"\" class=\"wp-image-1103\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-8.png 785w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-8-296x300.png 296w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/03\/image-8-768x778.png 768w\" sizes=\"(max-width: 785px) 100vw, 785px\" \/><figcaption>Initially charging at 14.7v\/40mA per battery then pulling charge down to 14.4v\/35mA per battery for the main charge cycle.<\/figcaption><\/figure>\n\n\n\n<p> charging at 15.5 in a desulfication phase <\/p>\n","protected":false},"excerpt":{"rendered":"<p>I had some dead 12v 12Ah batteries from an APC smart ups 1000 that were quite old (md 2009) and very dry. I have replaced them with a set of new 18Ah batteries. I thought I would try my hand at getting these old batteries going again. One battery was showing ~12 volts but could [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[24,17],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1101"}],"collection":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1101"}],"version-history":[{"count":14,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1101\/revisions"}],"predecessor-version":[{"id":1129,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1101\/revisions\/1129"}],"wp:attachment":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}