clovis86 | # 51 | 2017-09-14, 08:43 | Report

Just tried it yesterday, no contact, checked with an ohm-meter and all 3 connections are OK.

Attached Images

  

insanelysexy | # 52 | 2017-09-23, 19:33 | Report

OK.

SO about using Gionee Battery. It seems that the voltage shown by aqua fish, is not exactly near about the original voltage of battery. ( I measured the voltage, with multimeter, while phone was in use.)

/sys/class/power_supply/bms/voltage_ocv seems to more correct than /sys/class/power_supply/battery/voltage_now. Even that one fails, but it is still nearer to the original battery voltage.

And, the shutdown voltage seems to be 2.9V. 3 times I drained my phone completely, it shutdowns at 2.9V. from 3.3V it drains to 2.9V in minutes. And it wont start until battery is charged to atleast 3..0V.

One more thing I noticed:

My phone seems to kind of suspend itself whenever I lock my screen, and it takes 10s to unlock.

In systemdatascope, I can see my phone going in C1 and C0 states which I had not seen before this and I ahve no idea why it happens.

One more thing: /sys/class/power_supply/battery/capacity <- writing to this file sets up what percent your phone thinks the battery is !!


PS : C1 and C0 thing may be the effect of upgrading to version 2.0.4. Previous version was 2.0.2.

Edit : That unlocking issue --- the result of a corrupted mmc(i/o error). It may have gotten corrupted due to some improper shutdown. Changing the mcc, seems to have resolved the issue.

Edit2 : C0&C1 state effect was not of upgrading. It was also the side-good-effect of mmc corruption.After removing it, it is back to 99% C2 state.

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Last edited by insanelysexy; 2017-09-24 at 09:44.

Schturman | # 53 | 2017-10-01, 11:31 | Report

Interesting solution...
This pen can draw electrical circuits.
https://www.facebook.com/circuitbrea...hnGd6iCO0-zSQA

alfredquack | # 54 | 2017-11-05, 20:08 | Report

thanx for the solution.

I used foil and had it solderd directly to the battery contacts. Just works fine, only the phone rarely last for more than 3/4 of a day?!

shutting off wifi doesn't seem to have to big of an effect, gotta watch that further.

pichlo | # 55 | 2017-11-06, 10:35 | Report

I don't know about Jolla C, but for Jolla 1 this is absolutely normal. If you do not use it and just leave it on the shelf, you may get up to 3 days but if you actually use it, nota bene in less than ideal conditions, 1 day or even less is not entirely unexpected.

alfredquack | # 56 | 2017-11-06, 11:23 | Report

I doubt that'll work in this case, since at the intersection between contact and plastic it'll break sooner or later.

I found It easiest to just solder the foil to the contacts, since I did not have no condacting glue.

bomo | # 57 | 2017-11-07, 13:52 | Report

My impression was that the (currently available) UMI batteries have poor capacity. Maybe I got one that was old (laying in the ware house for some time).

chribbio | # 58 | 2018-02-17, 11:59 | Report

Same impression, my battery lasts far less thank a day with Wifi or data on

pasko | # 59 | 2018-02-21, 18:45 | Report

Hi.

I'm thinking about doing a battery replacement for my JollaC, but given the last comments, I'm not convinced about the batteries quality.
Is anyone with this solution still using the JollaC as a daily driver? I think a full day of use per charge would be more than enough for me...
Anyone willing to share their experience with this hack?

Thanks in advance.

Regards.

P.S: I'm already using an Xperia X, but would like to extend my Jolla C's life.

Viacheslav | # 60 | 2018-06-04, 11:21 | Report

I found some Intex br2567bu batteries on Taobao. Waiting for a package from China. I shall post if they are good for Jolla C when the package arrives.