Reading through his description of this is fun since he includes his observations from a logic analyzer captures. He suspects an occasional bad read is due to Linux interrupting code execution. He watches for and catches these bad reads in software and can now reliably read all the battery vitals.
The hack leaves him with a system that functions in much the same way the original computer did: plug it in and it charges. He did add some hardware that lets him take a voltage reading from the battery using an ADC on the Teensy that was already present to control the keyboard and case LEDs. Raspberry Pi laptops are not an uncommon sight, as many hardware enthusiasts have shoehorned the tiny board behind LCD panels into home-made cases.
His write-up is a very comprehensive PDF, that should serve as a good primer to anyone else considering such a laptop conversion. After putting the old battery back together with the new cells, it was recognized by my laptop. It appears to be looking for a cell voltage level that the new cells never hit. I assumed that the algorithm would be adaptive but it appears not. Charge cutoff in particular would be important.
I gave up and bought a used OEM battery. Tags: Electronics. At this point I gave up on bricking my laptop via a failed BIOS update and opted to plug it in and hope for the best. After much frustration and trying different combinations of removing and replacing the battery at different times, I decided to take the Steve approach and hack it :. Batteries are nothing but a means of storing power, so the controller must be responsible for communicating things like battery capacity and charging status.
I decided to transplant the new battery cells onto the old Sony controller and give it a shot; in short, it worked! Step 1 : Take batteries apart - remove 4 screws and pry top cover off, then gently pry out the batteries and controller card. Replacement Battery. I can easily get 4. Think about all the trouble to research and make sure you are buying good quality battery cells, then the hrs of time it will take most people to put everything together plus the risk of breaking something.
I don't see this being worth the risk and time investment when the slice battery is not that expensive and hardly really adds that much to the thickness of the laptop. However for the majority of people I would recommend the slice battery. Flickster , Nov 22, First, thanks for the tips and for you answers guys, all you said is true. I agree, it is taking risks and I am, for sure, not going to do that just after I get my brand new Vaio.
However, as Kanuk mentionned, I've been thinking of simply place cells in the ODD bay, the wires going throught the CD fence, and connect it to the station pin. But I don't even think finding a such pin connector is possible. I'll probably go for the slice battery option With an unfulfilled mind.
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