Hardware hacking modify the bits!
Posted 11 February 2013 - 02:51 AM
Posted 11 February 2013 - 03:40 AM
I've ordered some 2.1A charger from DX to see if it'll help before ordering new battery, or maybe to contact ICOO although I don't expect any relevant support from them at all.
Posted 11 February 2013 - 04:10 AM
Posted 11 February 2013 - 11:29 PM
Posted 14 February 2013 - 01:12 PM
I bought mine here:
There are a few more dealers there with the same battery for a dollar or two more.
Posted 18 February 2013 - 10:55 AM
Another question. And 'possible to hook the small connectors to the wires of the battery without having to unsolder the wires from the motherboard? In this way, not touching anything, and it's easy to connect the battery to the tablet in the future. Someone tell me would know what "connectors" buy on dealextreme?
Posted 18 February 2013 - 03:34 PM
Not sure what you want to do with your battery but I guess some tiny wire coupler would do. This one might be a little big... not sure about the dimensions:
Posted 23 February 2013 - 04:42 PM
Thank you for this very instructive topic.
I also have an Icoo D70 Pro II bought from Price Angels.
Like everyone, I am very pleased with the power and overall specs of this tablet, but the battery is MUCH too small.
The motherboard is v3 and the battery is labeled 2500 mah.
I read the 5000 mah battery change post from the russian guy (Thanks to Google Translate)and would like to do it myself.
However, the operations are not clear at all.
For instance, I see that this battery comes with a small integrated board. Do you have to unsolder it or do you have to keep it.
I have then a few questions :
1 - Jured states that it is less complicated that the russian guy said. Can you give detailed instructions about how to do it.
2 - Are there any cons about using a big(!) charger like the Ipad one (10W or 2000 mah).
3 - How do you root this tablet. Zhuodashi does not work
4 - For the moment my tablet is in a boot loop trap. Do you know how to get out of it. Price Angels is not cooperative at all here.
Someone made a film about this boot loop trap and my tablet is exactly in the same state :
I installed without problem CWM 6 and the darkwaterv2 rom. Now I am stuck with this boot loop !
Thank you for your help.
Posted 24 February 2013 - 08:32 AM
Here is a short version. The photos do not really show a step-by-step progression, they are meant for clarifying some things cryptic in the description.
0. Open the case. Slide a thumbnail between the case halves, or a plastic blade, being very careful to only snap open the links and not push the implement too deep. Work both long sides starting away from the connector side and work towards the side where the connectors are, until all snaps are loose. Lift the back lid away, moving it it the direction where the connectors are so these can disengage their respective holes.
1. Desolder the existing battery wires. Switch the tablet off first.
2. With a thin blade, cut through the double sided tape holding the battery to the display's back. I used a blunt vegetable knife to not risk damaging the display.
3. I removed the sticky residue with WD-40. Be careful to limit the stuff from spreading. I used a cotton bud. Afterwards I cleaned the WD-40 with methylated alcohol.
4. Desolder the speaker. Detach from the back; it is stuck down. A knife point will get ot out of the recess.
5. With coarse sandpaper, remove say 1mm from the back panel inside where the battery sits. I didn't mess with the speaker recess like the Russian chap did.
6. Unwrap the battery terminal PCB and desolder the wires. You will need to lengthen them. Don't detach the battery's PCB - that is not beneficial.
7. Fit the battery with the pcb facing towards the front of the unit. The wifi antenna is in a bit of a recess next to the display; that recess is enough for the battery PCB also.
8. Check if the back panel can be snapped closed. I used my soldering iron to trim the plastic bracket near the corner for the display. The Russian shows he used a knife.
9. Solder the longer battery wires on to the Battery PCB. Route them past the edge around where the speaker recess is located when the back is on. Route them past the camera connector and then onto the PCB. Determine the correct length, cut and strip, solder to the correct polarity pads. But solder the speaker wires back on first, as they end up under the battery wires. I made my wires a bit short so I was not able to route them past the camera connector, resulting in having to crowd past the connector.
10. Use double-sided tape to hold the wires in place. I pressed them into the space next to the display.
11. I left the wifi antenna where it was. I have excellent reception, except when I am at the opposite end of the house and my left hand is shielding the antenna. If you have poor reception, check that connections are clean as shown, on both ends where these are connected. The wifi antenna has a piece of conductive aluminium tape holding it in place as well as earthing it to the display back metal plane. These are important parts of the whole.
12. I didn't stick anything else. There is no room for anything to move so no need for glue. Just the wires I needed to keep from getting where they shouldn't.
This post has been edited by jured: 25 February 2013 - 01:27 AM
Posted 24 February 2013 - 05:49 PM
Thank you for your explanations.
My tablet shows a very strange behavior :
I connected other USB cables between the tablet and the original charger and one of them got me out of the boot loop.
So this flashing screen might not be a software problem.
I reinstalled the original rom dated 20 november from the Icoo site, then CWM 6.027 then in turn the Darkwater v2 Rom and the Jured rom.
All these operations went perfectly well and the tablet was always connected to its charger. A few minutes (the flashing time) separated the three rom tests so the battery should have shown the same indications in all three cases.
With the original rom, the battery indicator shows an almost empty battery (charging) which is the reality, while in the Darkwater and the Jured rom, the battery indicator shows 100% (no charging) !
Have you heard about this and how can I make these custom roms show the right indicator (and charge the battery, of course !).
Now I flashed back the original november rom and let the tablet charge for the night.
This post has been edited by Patrickis: 24 February 2013 - 06:16 PM
Posted 24 February 2013 - 10:22 PM
Flashing another ROM almost always has the resulkt that the on-board files are not in sync with the actual state of charge. Usually re-sync happens when the battery is full, when the batt files are updated. You can do this manually, it is usually called battery calibration, but it isn't really, all that normally happens, at full charge, the battery files get updated.
So most likely, the batt files in those ROMs were captured with full or near-full batteries. It is a good approach to fully charge the battery before messing with flashing ROMs. This is usually the first step in the procedures that I have seen.
Posted 25 February 2013 - 05:02 AM
Very nice work .
Thank you for your explanations and your pictures.
I answered you in tne thread :
I will go again into the whole process of flashing Darkwater v7 with a full battery and let you know.
BTW which rom is better : Darwater v2 for D70 Pro II or generic V7 and where can this last rom be found ?
This post has been edited by Patrickis: 25 February 2013 - 05:07 AM
Posted 25 February 2013 - 07:50 AM
Posted 26 February 2013 - 05:11 AM
1 - Get out of the flashing boot loop by using various chargers and cables (I do not know how, but it worked)
2 - Install the original november rom from Icoo site with RKBatchTool
3 - Fill the battery for one night - i.e. until it is full or almost full
4 - Install CWM 6.0.27 with RKAndroidTool
5 - Install Darwater rom v2 using CWM
And now it back to normal and works very fine !!!
It still has the same lousy battery though so I am ordering a 5000mah one now and follow the instructions of Jured for the installation.
This post has been edited by Patrickis: 26 February 2013 - 05:12 AM