tag:blogger.com,1999:blog-88833254330814843392012-02-16T00:18:25.035-08:00jakubzhttp://www.blogger.com/profile/02229539308661969015noreply@blogger.comBlogger11100tag:blogger.com,1999:blog-8883325433081484339.post-2872131684664707162008-10-24T07:59:00.000-07:002008-10-26T07:44:26.608-07:00Disassembling an ASUS A2 class accumulator<br />Please note that these accumulators are not meant to be disassembled by customers and I do not carry any responsibility for harm on your devices or health!<br /><br />This article is linked with <a href="http://repair4laptop.org/">http://repair4laptop.org/</a> a good site for laptop fans.<br /><br />Well, I'm a thrifty guy and always have a hard time to throw away stuff, so I have tried to disassemble my accumulator in order to replace just the failing cells. I can say now it was not a success, it caused damage on vital part of the accu. Therefore take this article as "what to avoid" topic...<br /><br /><div style="text-align: left;"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHi-GO3bZI/AAAAAAAAENQ/9UWWCwC-IOg/s1600-h/IMG_1026.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHi-GO3bZI/AAAAAAAAENQ/9UWWCwC-IOg/s320/IMG_1026.JPG" alt="" id="BLOGGER_PHOTO_ID_5260735396198182290" border="0" /></a>First I tried to wrest the points where I expected plastic hooks. No avail, the cover consists of two parts carefully glued together<br /></div><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHi-6F7q6I/AAAAAAAAENg/VMUxsiZG_RM/s1600-h/IMG_1033.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHi-6F7q6I/AAAAAAAAENg/VMUxsiZG_RM/s320/IMG_1033.JPG" alt="" id="BLOGGER_PHOTO_ID_5260735410119355298" border="0" /></a>After the first lost fight I decided to punch a few holes with hammer and screwdriver. No avail again, it held tight and it punched and damaged the printed circuit board I didn't expect. On the left side you can see the accu's connectors, the fatal hole is in the center.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://1.bp.blogspot.com/_vFdDcX3Ann0/SQHkcoQPydI/AAAAAAAAEOQ/qW8OpUn7Ywo/s1600-h/pila.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://1.bp.blogspot.com/_vFdDcX3Ann0/SQHkcoQPydI/AAAAAAAAEOQ/qW8OpUn7Ywo/s320/pila.JPG" alt="" id="BLOGGER_PHOTO_ID_5260737020238481874" border="0" /></a>The right key was a hacksaw (normally used for cutting metals) and careful work on the long side opposite to connector and on the two short flanks of the battery.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://4.bp.blogspot.com/_vFdDcX3Ann0/SQHkcQebuAI/AAAAAAAAEOI/enTnZn9Zlb8/s1600-h/IMG_1063.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://4.bp.blogspot.com/_vFdDcX3Ann0/SQHkcQebuAI/AAAAAAAAEOI/enTnZn9Zlb8/s320/IMG_1063.JPG" alt="" id="BLOGGER_PHOTO_ID_5260737013855533058" border="0" /></a>Uncovered connector on its PCB, the punched tiny resistor compared to pencil tip and tweezer. Soldering this back is beyond my abilities.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHkb_ycyMI/AAAAAAAAEOA/arUMh1qu7FI/s1600-h/IMG_1058.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHkb_ycyMI/AAAAAAAAEOA/arUMh1qu7FI/s320/IMG_1058.JPG" alt="" id="BLOGGER_PHOTO_ID_5260737009376086210" border="0" /></a>There even is a little something that serves as thermoreceptor, probably for preventing overheating and explosion.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHkbljkdOI/AAAAAAAAEN4/l_fQ-r_QX1I/s1600-h/IMG_1043.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHkbljkdOI/AAAAAAAAEN4/l_fQ-r_QX1I/s320/IMG_1043.JPG" alt="" id="BLOGGER_PHOTO_ID_5260737002334352610" border="0" /></a>That is how the cells are connected together -- in pairs. In my case this wiring and just one failing cell caused the voltage to drop on 8V from 14.8V. The laptop didnt even start.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHi_eGVWbI/AAAAAAAAENo/WnBVPgIFT4c/s1600-h/IMG_1035.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://2.bp.blogspot.com/_vFdDcX3Ann0/SQHi_eGVWbI/AAAAAAAAENo/WnBVPgIFT4c/s320/IMG_1035.JPG" alt="" id="BLOGGER_PHOTO_ID_5260735419784714674" border="0" /></a>You will need a voltmeter to measure for the failing cell. There are four pairs of cells in the accu, three pairs showed 3.7V, one 2.2V.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHi_56wkSI/AAAAAAAAENw/NjhZjwRaDiM/s1600-h/IMG_1037.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 240px; height: 320px;" src="http://3.bp.blogspot.com/_vFdDcX3Ann0/SQHi_56wkSI/AAAAAAAAENw/NjhZjwRaDiM/s320/IMG_1037.JPG" alt="" id="BLOGGER_PHOTO_ID_5260735427252359458" border="0" /></a>The cells are referred to as icr18650 - Rechargeable Lithium Ion Cylindrical Battery. It is all glued in the case.<br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://1.bp.blogspot.com/_vFdDcX3Ann0/SQHi-k97TFI/AAAAAAAAENY/skIU4LwUwig/s1600-h/IMG_1030.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 240px;" src="http://1.bp.blogspot.com/_vFdDcX3Ann0/SQHi-k97TFI/AAAAAAAAENY/skIU4LwUwig/s320/IMG_1030.JPG" alt="" id="BLOGGER_PHOTO_ID_5260735404448631890" border="0" /></a>I hope it helps..<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/8883325433081484339-287213168466470716?l=jakubz.blogspot.com' alt='' /></div>jakubzhttp://www.blogger.com/profile/02229539308661969015noreply@blogger.com0