pavelmachek (pavelmachek) wrote,
pavelmachek
pavelmachek

Collie charging

I searched web a bit to find what li-ion thresholds are. I ended up with

/*
{ 420, 100 },
{ 417, 95 }, means it will report 100% between 418 and 420
*/

/* It looks like these values are in deciVolts */
struct battery_thresh collie_battery_levels_acin[] = {
{ 420, 75}, /* 75% full and 100% full li-ion battery can not be told by voltage, but by amps... */
{ 417, 70},
{ 415, 65},
{ 410, 60},
{ 405, 55},
{ 400, 50},
{ 390, 35},
{ 385, 20},
{ 375, 7},
{ 360, 3},
{ 340, 1},
{ 0, 0},
};

/* See for example http://www.kokam.com/english/biz/rc.html for
* voltage/capacity characteristic. I assume it is going to be
* reasonably similar to li-ion used in collie.
*
* Collie with frontlight level 2 will last ~2.5 hours, so we are at
* ~0.5C. */
struct battery_thresh collie_battery_levels[] = {
{ 395, 100},
{ 390, 90},
{ 385, 85},
{ 380, 80},
{ 375, 70},
{ 370, 60},
{ 365, 50}, /* From sharp code: battery high with frontlight: 368 */
{ 362, 40},
{ 360, 30},
{ 358, 20}, /* From sharp code: battery low with frontlight: 358 */
{ 356, 10}, /* From sharp code: battery verylow with frontlight: 356 */
{ 0, 0},
};

If any has any ideas where to get better numbers... please let me know. Also it would be interesting to know how much different parts of collie take; all I know is this pretty old list; not sure about its accuracy.

132mA base system
+103mA for 25% backlight
+155mA for 50% backlight
+270mA for 75% backlight
+450mA for 100% backlight
+284mA for audio + cpu (mp3 playback)

Comments?
Subscribe
  • Post a new comment

    Error

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

    When you submit the form an invisible reCAPTCHA check will be performed.
    You must follow the Privacy Policy and Google Terms of use.
  • 0 comments