I thought about a way to solve the expensive oddball battery problem that is so often found in old electronics like portable radios. The B battery voltages of old portable tube radios are 45 V, 67.5 V and 90 V. The number of 1.5 VDC cells in each of these is 2\/3 of the number of volts. 45 V is 30 cells, 67.5 V is 45 cells and 90 V is 60 cells.<\/p>\n
Different sized cells have different current capacity ratings. A typical alkaline AAA cell is rated for 800 mAh. The button cells have lower ratings. The LR44 AKA AG13 button cell is rated for approximately 100 mAh.<\/p>\n
The LR44 cell is 5.4 mm or 0.213 inch high (according IEC 60086-3). The cells can be stacked to get any voltage in increments of 1.5 VDC.<\/p>\n
I can buy 100 LR44 cells on eBay for less than $10.00, name brand cells are more expensive. I can stack them easily – I’ve used this method with AA and AAA cells and it works okay.<\/p>\n
I stacked the cells, end-to-end with them all pointing positive to the same direction. I cut a piece of paper to the same width as the length of the cells. Then I put the cells on the edge of the paper and rolled them up in a roll. I put a few rubber bands around the paper to hold it tight and to not unroll. I later put clear adhesive tape once I was satisfied.<\/p>\n
I would break up the cells into two equal stacks and put them side-by-side so the plus and minus were next to each other on the same end. The problem with making a 22.5 V stack is that it’s an odd number of cells – a 7 cell and an 8 cell stack. So it makes sense to add one cell and make both 8 for a total of 24 V.<\/p>\n","protected":false},"excerpt":{"rendered":"
I thought about a way to solve the expensive oddball battery problem that is so often found in old electronics like portable radios. The B battery voltages of old portable tube radios are 45 V, 67.5 V and 90 V. The number of 1.5 VDC cells in each of these is 2\/3 of the number <\/p>\n (Read More…)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-14655","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/14655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14655"}],"version-history":[{"count":3,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/14655\/revisions"}],"predecessor-version":[{"id":14670,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/14655\/revisions\/14670"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}