Wolfgang Spraul <[email protected]> writes: > this is an excellent document, obviously I cannot spot anything > wrong!
Thanks for you kind words. :) > I didn't know that some external chargers would not charge gta01 or gta02 > batteries because of the thermistor check you are writing about. I'm not sure i saw any charger like that myself or seen reports (except on our wiki). But i suspect the probability of that for nokia brand charges is quite high. > All the cheap external chargers we bought in Taiwan or China for testing can > charge both gta01 or gta02 batteries without a problem. Proves my point :D > I have a question for all: > We will ship our first NanoNote with a BL-4C compatible battery, without > Coulomb counter (middle pin unused) [1]. Hm, can BL-5C fit there? Because it'd be much nicer as modern 5Cs have quite some capacity. > How are people really using the Coulomb counter in gta02? > Theoretically I would think that it provides far superior power measurement > options for actual software development, just as you write. > For example when playing with power saving codes, whether in the kernel, > middleware or applications, I would think over the course of several hours or > days the Coulomb counter data is the primary means for efficient > development. To me it seems that CC readings are almost unused except for presenting the user with a bit more accurate capacity data. And when someone is developing something lowlevel he could as well connect and external ampmeter, much more reliable and flexible approach. > So we are considering shipping the next version of the NanoNote with Coulomb > counter batteries same as the Neo FreeRunner. > But if nobody is actually using the data from the Coulomb counter, then it's a > wasted effort. I'm not sure you'll get much for using CC. The only problem so far with using a dumb battery on FR is that there's no way to know the current from inside the device. On gta01 there's a resistor shunt supposed to be used to measure the current but readings are too noisy to be useable. So if you have a good way to measure current already i'd not go for CC. -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:[email protected] _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
