[ltp] Almost dead battery

[Stefan Monnier]

>> > If either the active i2c channel goes silent, or battery cell telemetry
>> > received is shows a cell is bad, it will blink red.  It also does
>> > temperature and charge telemetry, and has alarms tied to it.
>> Makes me wish all that info were exposed to GNU/Linux :-)
> tp-smapi shows it, by issuing EC commands, hopefully it works well on
> the T61.  I don't think you can do it through standard ACPI methods in
> the T61.

Are you thinking of the data exposed in /sys/devices/platform/smapi/BAT0/
(as (re)attached below)?  Then which part of it gives that detailed info?

>> At least this doesn't seem to be the case for my battery, since its
>> remaining charge is still able to keep the machine running (tho
>> obviously only until I use up the currently remaining 50%, after which
>> it'll be "truly dead" unless I find a way to recharge it).
>
> Hmm, usually when a battery pack does not *charge*, it is not a problem
> in the battery pack, but rather in the notebook/charger
> controller/charger.  Or the notebook's power supply, but if it is
> working without the battery pack at all, that should rule it out.
>
> You'd need to try to charge either a different battery pack in your
> notebook, or to try to charge this battery pack in a different notebook
> to know for sure.

That same T61 laptop charges my T60's battery just fine, so it looks
like it's not the T61 or its power brick that's at fault, but really the
battery pack itself, even though it is still able to power the machine :-(


        Stefan


% (cd /sys/devices/platform/smapi/BAT0/; grep . *)
barcoding:1ZKTJ44WTTL
charging_max_current:0
charging_max_voltage:0
chemistry:LION
current_avg:0
current_now:0
cycle_count:253
design_capacity:84240
design_voltage:10800
dump:c0 80 01 02 e0 41 00 00 00 00 00 00 00 00 00 00 
dump:c0 c2 00 80 98 0b 19 2e 00 00 00 00 32 00 7c 04 
dump:c0 c2 1b 09 ff ff ff ff ff ff c0 00 fd 00 -- 00 
dump:c0 c2 e8 20 30 2a 31 00 9c 44 f9 96 -- -- -- 00 
dump:c0 c2 53 41 4e 59 4f 00 00 00 00 00 00 00 00 00 
dump:c0 c2 34 32 54 34 36 31 39 00 00 00 00 00 00 00 
dump:c0 c2 4c 49 4f 4e 00 85 93 02 00 00 00 00 00 00 
dump:c0 c2 31 5a 4b 54 4a 34 34 57 54 54 4c 00 00 00 
dump:c0 c2 7a 46 -- -- -- -- -- -- -- -- -- -- -- 00 
dump:c0 c2 11 0a 12 00 00 00 00 00 -- -- -- -- -- 00 
dump:c0 c2 42 85 93 02 00 00 5b 0f 60 0f 5e 0f 04 05 
first_use_date:2015-03-26
force_discharge:0
group0_voltage:3934
group1_voltage:3936
group2_voltage:3931
group3_voltage:0
inhibit_charge_minutes:0
installed:1
last_full_capacity:23310
manufacture_date:2014-04-28
manufacturer:SANYO
model:42T4619
power_avg:0
power_now:0
remaining_capacity:11480
remaining_charging_time:not_charging
remaining_percent:50
remaining_percent_error:18
remaining_running_time:not_discharging
remaining_running_time_now:not_discharging
serial:38649
start_charge_thresh:80
state:idle
stop_charge_thresh:90
temperature:23700
voltage:11801
%