{"id":825,"date":"2013-09-04T04:40:15","date_gmt":"2013-09-04T04:40:15","guid":{"rendered":"http:\/\/www.aussiebatt.com\/blog\/?p=825"},"modified":"2013-09-04T04:40:15","modified_gmt":"2013-09-04T04:40:15","slug":"rebuilding-makita-power-tool-battery-instructions","status":"publish","type":"post","link":"https:\/\/www.aussiebatt.com\/blog\/rebuilding-makita-power-tool-battery-instructions\/","title":{"rendered":"Rebuilding Makita Power Tool Battery Instructions"},"content":{"rendered":"

Got Makita power tool at home and the cordless drill battery wouldn\u2019t take a charge, no matter how hard I tried to \u201cwake them up\u201d.\u00a0 Checked the prices of a replacement Makita power tool battery online,\u00a0 they run around AU $70 each and more than I wanted to spend on a $37 cordless drill kit, so decided it was time to rebuild Makita cordless power tool battery.<\/p>\n

\"rebuild-makita-6339dwde-power-tool-battery\"<\/a><\/strong><\/p>\n

Rebuild Instructions<\/strong><\/p>\n

First trick was to decide how to cut into the solvent welded case.\u00a0 I decided to take a chisel tip on a light soldering iron and cut an outline just on the top of the base, that way after I glued it back together the latch on the Makita drill would still hold the cordless drill battery pack together. Turned out that it was a good decision.\u00a0 The pack came apart pretty cleanly and even left some of the battery locators in place.<\/p>\n

Pack looks like this with the top section removed.\u00a0 The 14.4V power tool battery pack has 12 sub-C NiCads in series.\u00a0 That\u2019s nominally 1.2v per cell, and about what Ni-Cd MAKITA 1422 Power Tool Batteries<\/span><\/a> are rated at.\u00a0 The black insulator sheet you seen on top of the main battery pack is sticky on both sides, and takes some persuasion to allow the top to slide off. One way I\u2019ve found to do this in a pack of series batteries is to first charge them up and start looking for weak sisters singly, then to do the same starting at one end and check the build up in series.<\/p>\n

Patching in a new power tool battery. Charge them up, check the voltages, run them down check the voltages. By now, I\u2019ve replaced four of the cells with better cells from my spare parts stash, but things aren\u2019t getting much better!\u00a0 I\u2019m finally starting to realize that the\u00a0Makita 9120 Power Tool Battery<\/span><\/a> cell packs are really pretty well balanced and if it isn\u2019t a premature failure, then they\u2019re pretty well all gone at once!\u00a0 It probably wasn\u2019t helped by the previous owner riding them hard and putting them away dead.<\/p>\n

A couple more cells, and I realized that the only way to rebuild this pack was to replace all the cells.\u00a0 NiCad sub-C\u2019s are about $5 each and NiMnH are about $6 each.\u00a0 That means I could rebuild it with NiCads for about $60 \u2013 or about what a new battery pack would cost!\u00a0 It might be reasonable to try to find a premature cell failure in an existing pack, but not rebuilding one completely.<\/p>\n

\n

\"makita-cordless-drill-batteries\"<\/a><\/h2>\n

Wholesale Makita Power Tool Battery<\/h2>\n

Australia Cordless Drill Battery Supplier: AussieBatt offers a complete and comprehensive product line of high quality extended life MAKITA power tool batteries. Our Makita power tool batteries are designed to be fully compatible with the original cordless drills.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Got Makita power tool at home and the cordless drill battery wouldn\u2019t take a charge, no … Rebuilding Makita Power Tool Battery Instructions<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,6,401],"tags":[546,544,545],"class_list":["post-825","post","type-post","status-publish","format-standard","hentry","category-battery-knowledgebase","category-how-to","category-power-tools-battery-tips","tag-makita-6339dwde-power-tool-battery","tag-makita-9120-power-tool-battery","tag-rebuild-makita-power-tool-battery"],"_links":{"self":[{"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/posts\/825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/comments?post=825"}],"version-history":[{"count":1,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/posts\/825\/revisions"}],"predecessor-version":[{"id":828,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/posts\/825\/revisions\/828"}],"wp:attachment":[{"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/media?parent=825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/categories?post=825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.aussiebatt.com\/blog\/wp-json\/wp\/v2\/tags?post=825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}