On Fri, 2009-05-15 at 17:03 +0200, Laszlo KREKACS wrote: > Hi! > > Maybe the wiki is a bit disambiguous, but none of the replacement battery > works > in freerunner. > > That said, the battery in freerunner has a "Coulomb counter", which is > required by the freerunner. > All the other battery does not contain a coulumb counter (nokia bl-5c, > 6c, etc), > therefore freerunner CAN NOT charge it. And CANT display the remaining > capacity.
That's sad. > > The only way to use this batteries atm, is you charge the battery > EXTERNALLY (via an another nokia phone or external charger), then you > put into the freerunner and use it. > However you will not have any indication about the remaining capacity. > When I charge FR, it will be shutdown automatically. So I have a question here, If I have charged battery with external charger. Then I put it back to FR, will it shutdown automatically? Cause I don't have external charge right now. Any one has the experience, please let me know, thanks in advance. > If I understand correctly this is only a SOFTWARE LIMITATION. > That said, if somebody write a correct driver it can be charged this > type of batteries too. The problem with it, is the exact specification of > the battery is not available, and if you charge incorrectly it can even > explode. Ah...... Maybe I have take a took at spec. I'm on travel today. Seems it can't work with the new battery. :( > > So writing a correct driver requires many trial-and-error, and the possibility > to destroy the battery and the freerunner too. > Because you need to estimate how much you already charged the battery > (the coulomb counter says exactly how many charges it took), and the > remaining battery indicator would be just an approximation. > (like the 3-4 bar on the mobile phone) Humm, seems reasonable, does the external charge the battery other way than FR? > > It is just a speculation, but imho writing this driver is not as > difficult as it seems > at the first look. If somebody spy how the nokia phone charges its > battery, we could replicate the > process. We should simply monitor the voltage and the current of the battery. > Needs some simple circuit(couple of wires and a soldering iron, and > proper multimeter). > And based on this knowledge, somebody could create a driver. > It is not impossible after all. > > However should take some precaution, because it can explode/or getting > overheated, > but not impossible. Good news :) > > And there are some economic sense. The nokia battery costs 6EUR here, while > the > freerunner's costs 25EUR plus postal service (30EUR). Yeah,,,,, Cause right now I don't know what type I should buy. > > I simply took back to the shop where I bought my battery. I buyed a > car charger instead.;) Quick way, I'll try is ASAP :) > > Correct me if Im wrong. Thanks for all u info :) > > Best regards, > Laszlo -- Daniel.Li <lida_m...@163.com> PALFocus (http://palfocus.oicp.net) _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community