Jolla is only charging for a short while

asked 2015-08-06 19:47:36 +0300

ckaktus gravatar image

For some weeks I have the problem that my Jolla charges properly just for a short while and then limits the ibatmax to 500mA (read out via chargmon, dmesg, upower -d). So my Jolla is still discharging with only 500mA. Only way I'm able to charge is to unplug the usb cable and try it again. I'm pretty sure it ain't the charger, because I already brought a new won, with more than enough current and tried with it and with my computers. Everywhere the same result. Also I tried resetting my Jolla, it didn't helped too (But I tried it only with release 1.16.27). Had someone here got the same problem? Maybe a solution? Or is it a Hardware bug?

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I've experienced a loose USB plug on the phone, often stopping the charging with a very small move of the device or cable. Must keep it in certain position to charge constantly. Also Hunger meter app shows different values while charging, depending on the positioning.

simo ( 2015-08-06 20:03:36 +0300 )edit

I guess this isn't the cause here. I moved the cable while charging (with 1100mA) and it didn't stopped charging with 1100mA. Also if I lay it down on the table while charging with 1100mA, so it doesn't move while charging, but still it stops charging after some time. One thing that I didn't try is charging with a THO, because I have no one.

ckaktus ( 2015-08-06 20:28:49 +0300 )edit

hmm... issues with power management are not reported in any remarkable scale, so I'd list (1) USB cable (2) heat on the battery, charger or phone (3) aging of battery cells (4) dirty connector between battery and phone, clean with alcohol, rubber or gentle scratching. Hope one of these solves your issue.

Data of currents and power consumption, and testing with phone turned off might also be useful if any of those doesn't help.

simo ( 2015-08-06 20:45:34 +0300 )edit

have you checked the battery with CSD tool ? i would also check the temperature

pawel ( 2015-08-07 19:48:28 +0300 )edit

Battery temperature: idle/charging/light load ca. 30°C, high load e.g.. browsing via LTE 40°C Since the problem appeared I tried 3 different USB-Cable, so not very likely to be the source of my problem. According to the csd tool 94,10% Capacity Health: Good. also passed the Discharge test and Battery Resistance with β=-0,184 α=4,210 σ²=0,934. Till now I didn't came to clean the connectors, but I found a third Charger (an old Nokia charger with 1,2A) which seems to charge reliably with max. charge current 1,1A.

ckaktus ( 2015-08-07 23:28:31 +0300 )edit