tak_l._poon1 Posted July 9, 2009 Share Posted July 9, 2009 <p>Dear All, since I have some idling non-working batteries around, I opened some of them and have a look. It is very simple, eight cells, and a very simple wiring. I wonder why I had not done this earlier. There is a resistor like device in some white paste. I guess that is a heat sensitive resistor that give the charger a signal when to stop charging. But of course for those who are more knowledgeable than I am, like Mr. Vijay Nebhrajani and others who have a more engineering background, please correct me if I am wrong.</p> <p >I post here a diagram of the pinouts, this may help anyone who would like to replace the cells themselves.</p> <p ><a href="http://www.photo.net/photo/9453031">http://www.photo.net/photo/9453031</a> </p> <p >cheers,</p> <p >Tak</p> Link to comment Share on other sites More sharing options...
graham_mitchell Posted July 9, 2009 Share Posted July 9, 2009 <p>Could I suggest not using a thin black line for the battery graphic? It confuses the diagram a little because it looks the same as the wiring.</p> Link to comment Share on other sites More sharing options...
gerber_van_der_graaf Posted July 9, 2009 Share Posted July 9, 2009 <p>That's quite interesting as these batteries (new) will become less available now Rollei its closing its doors. When not available at all anymore my 6008 camera will be useless. Do you have any idea for how long these batteries do last? I hope much longer than those of my laptop computer and cellphone: the batteries of these devices are the first thing that fail (often after 2 years already) and force me to buy a complete new computer or gsm.</p> <p>Are the cells AA-type or alike? Can you post a photo of the opened battery?<br> Gerber</p> Link to comment Share on other sites More sharing options...
graham_mitchell Posted July 9, 2009 Share Posted July 9, 2009 <p>Gerber, there's no need to worry. The batteries can be upgraded with more modren cels and in fact I highly recommend this upgrade! See my blog article: http://www.foto-z.com/blog/?p=72</p> Link to comment Share on other sites More sharing options...
tak_l._poon1 Posted July 9, 2009 Author Share Posted July 9, 2009 <p>Dear Graham, I shall try to redraw the diagram this evening. I shall ask a friend of mine to teach me the proper way of drawing schematics.<br> Dear Gerber, the shell and wires of the batteries should last for a very long time, but the NiCad cells inside would last as long as any NiCad cells produced by Sanyo OEM, and definitely not for life.<br> If you stick to guidelines for caring of NiCad batteries, e.g. completely discharge them before recharging each time, then they should last to their normal life expectancy. Otherwise for dead batteries, replacement of the cells can be done as mentioned by so many threads before.<br> The total voltage of the 8 cells would be 9.6V. This is incompatible with alkaline batteries.<br> I shall post a photo of an opened battery asap. The simple circuit is at the contact end. The bulk of the battery is taken up by 8 cells in 2 columns, all wrapped by clear plastic to prevent the leads from touch the metal shell.<br> Tak</p> <p> </p> Link to comment Share on other sites More sharing options...
vijay_nebhrajani Posted July 9, 2009 Share Posted July 9, 2009 <p>Graham, where did you get the spot welding done?</p> Link to comment Share on other sites More sharing options...
graham_mitchell Posted July 9, 2009 Share Posted July 9, 2009 <p>Vijay, a local shop did it. Any shop specialising in battery packs for remote control toys should be able to do it.</p> Link to comment Share on other sites More sharing options...
tak_l._poon1 Posted July 9, 2009 Author Share Posted July 9, 2009 <p>That was a wonderful blog with all the information, Graham. I have nothing more to add. I have tried to redraw the diagram, hope that is better, but I am no professional in doing that. Tak.</p><div></div> Link to comment Share on other sites More sharing options...
User_3607948 Posted July 9, 2009 Share Posted July 9, 2009 <p>To all,<br> There's very little to add except to note its possible to obtain battery clusters of eight cells, welded connections, insulated with plastic wrap, two eyelets to solder. Most suppliers would know how to order. Add the heat sensors Tak mentioned and the battery refresh is completed!</p> <p>Joe</p> Link to comment Share on other sites More sharing options...
gerber_van_der_graaf Posted July 9, 2009 Share Posted July 9, 2009 <p>Great! From http://www.foto-z.com/blog/?p=72 I understood that the original charger cannot be used. Then, the pins for the battery will have to be connected correctly to the charger, i.e. #2 and #4. I suppose that the heat-sensitive element of the battery cannot be used by a general adapter or charger to prevent overcharging or overheating.</p> Link to comment Share on other sites More sharing options...
graham_mitchell Posted July 9, 2009 Share Posted July 9, 2009 <p>Gerber, that is true but some chargers (such as the MAHA I use) include a magnetic temperature probe which sits on the battery case and monitors temperature.</p> Link to comment Share on other sites More sharing options...
tak_l._poon1 Posted July 9, 2009 Author Share Posted July 9, 2009 <p>Dear Joseph,<br> I include the heat sensor for completeness sake. I think if we have already changed the cells and use different chargers, the sensor is not needed anymore.<br> I am now trying to do my first replacement surgery, with the help of my friend. The batteries come in a pre-welded set of 8, that gives me an easy start.<br> Tak</p> Link to comment Share on other sites More sharing options...
vijay_nebhrajani Posted July 10, 2009 Share Posted July 10, 2009 <p>Hey Tak,</p> <p>I'm sure your NiCad to NiMH conversion will go smoothly - but do post your results, and do let us know where you got your components from. Also, what charger will you use?</p> Link to comment Share on other sites More sharing options...
tak_l._poon1 Posted July 10, 2009 Author Share Posted July 10, 2009 <p>Sure I will. I got the cells from a local toy model shop. They sell airguns and RC cars. They have never encountered people buying these cells for a camera.<br> I use the TLP charger, available in that same toy model shop but also on the web:<br> <a href="http://www.wgcshop.com/pcart/shopper.php?itm=TLP-CHR-15110_cat_Chargers%20And%20Dischargers">http://www.wgcshop.com/pcart/shopper.php?itm=TLP-CHR-15110_cat_Chargers%20And%20Dischargers</a><br> It is temporarily out of stock. But actually a new model is coming out. I need a certain adaptation of the connectors. According to my engineer friend this charger detect the slight drop of voltage at the end of the charging process and automatically change over to trickle charging mode, and therefore does not need a heat sensor. As you must have known, a charger for NiCad uses a slightly higher current for trickle charging than a charger for NiMH and therefore will damage NiMH cells. But this charger can detect the cell types and can use the correct trickle current.<br> Tak</p> Link to comment Share on other sites More sharing options...
User_3607948 Posted July 10, 2009 Share Posted July 10, 2009 <p>Tak,<br> You're correct. The only reason I would re-install the temp sensor is if someone would use the Rollei charger (which may not work with higher capacity batteries.) I've also upgraded to a better charger.<br> Now should anyone want a <em>really </em>high-capacity battery then buy a 9.6 volt cluster for a portable drill, saw, etc and connect via the Rollei external battery connection. I suppose for those using the camera in a studio or fixed location - say tripod - this may have some attraction, especially if the small clusters prove difficult to obtain.<br> Once we all master the battery then we'll turn our attention to the electronics ;)</p> <p>Joe</p> <p> </p> Link to comment Share on other sites More sharing options...
l_a_k_h_i_n_d_e_r Posted July 14, 2009 Share Posted July 14, 2009 <p>details of an old <a href="http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=006tER">thread </a><br> its pictures are at http://www.photo.net/photodb/folder.tcl?folder_id=362643</p> Link to comment Share on other sites More sharing options...
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