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| The Following User Says Thank You to insanelysexy For This Useful Post: | ||
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2025-02-08
, 13:38
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Posts: 1,998 |
Thanked: 3,344 times |
Joined on Jun 2010
@ N900: Battery low. N950: torx 4 re-used once and fine; SIM port torn apart
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#3
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Originally Posted by insanelysexy
Buy a new battery?
BL-5J is dead.
Converted a 19V charger to 4.0V using LM2596, attached to + and -. Added a 4.7K resistor between + and the third terminal.
Now, the phone is in boot-loop - repeatedly Nokia logo keeps on showing.
Any ideas?
| The Following User Says Thank You to Wikiwide For This Useful Post: | ||
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2025-02-08
, 14:00
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Posts: 1,730 |
Thanked: 4,773 times |
Joined on Apr 2018
@ Helsinki, Finland.
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#4
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I would suggest the same before doing/trying anything else.
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"I don't know how but I can try!" (active)
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| The Following User Says Thank You to Maemish For This Useful Post: | ||
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2025-02-09
, 04:12
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Posts: 112 |
Thanked: 116 times |
Joined on Apr 2012
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#5
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Originally Posted by Wikiwide
I am not getting good batteries locally. Also, my use-case makes it compulsory to be plugged-in all the time. Last battery ended up getting the bulge in a month. Hence.
Buy a new battery?
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2025-02-09
, 17:14
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Posts: 877 |
Thanked: 2,535 times |
Joined on Feb 2012
@ Germany
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#6
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Originally Posted by insanelysexy
As far as I know you need this small chip from an old battery.
EDIT: Now it is not a bootloop. Nokia shows up as seen in the image. and then dies again.
So use the connector and small PCB from an old battery remove the battery and solder your voltage supply to it.
__________________
N900: gpxsee, fahrplan, gpscon, genwall, qrcode, hextool, libjansson4, libevent-2.0-5, cnee, psi-plus, mihphoto, shc
Maemo flasher/rescue live image.
Fremantle Harmattan SDK VM
N900: gpxsee, fahrplan, gpscon, genwall, qrcode, hextool, libjansson4, libevent-2.0-5, cnee, psi-plus, mihphoto, shc
Maemo flasher/rescue live image.
Fremantle Harmattan SDK VM
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2025-02-09
, 17:35
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Posts: 877 |
Thanked: 2,535 times |
Joined on Feb 2012
@ Germany
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#7
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For a full battery there is roughly 100kOhm between minus and third pin. This is measured by BME through twl4030-madc.
When the resistance is to low the watchdog kicks in. So remove the resistance between plus and third pin and try to solder a bigger one between minus and and third pin. At least 80kOhm.
Last edited by Halftux; 2025-02-09 at 18:47. Reason: sorry meant third pin not plus!!!
When the resistance is to low the watchdog kicks in. So remove the resistance between plus and third pin and try to solder a bigger one between minus and and third pin. At least 80kOhm.
__________________
N900: gpxsee, fahrplan, gpscon, genwall, qrcode, hextool, libjansson4, libevent-2.0-5, cnee, psi-plus, mihphoto, shc
Maemo flasher/rescue live image.
Fremantle Harmattan SDK VM
N900: gpxsee, fahrplan, gpscon, genwall, qrcode, hextool, libjansson4, libevent-2.0-5, cnee, psi-plus, mihphoto, shc
Maemo flasher/rescue live image.
Fremantle Harmattan SDK VM
Last edited by Halftux; 2025-02-09 at 18:47. Reason: sorry meant third pin not plus!!!
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2025-02-09
, 21:05
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Posts: 112 |
Thanked: 116 times |
Joined on Apr 2012
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#8
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Originally Posted by Halftux
Yes this is what I did - use ~110K Ohms.
For a full battery there is roughly 100kOhm between minus and third pin. This is measured by BME through twl4030-madc.
When the resistance is to low the watchdog kicks in. So remove the resistance between plus and third pin and try to solder a bigger one between minus and and third pin. At least 80kOhm.
Found it here: https://electronics.stackexchange.co...some-batteries
&& ChatGpt (~100K Ohm)
Last edited by insanelysexy; 2025-02-09 at 21:14.
| The Following User Says Thank You to insanelysexy For This Useful Post: | ||
Converted a 19V charger to 4.0V using LM2596, attached to + and -. Added a 4.7K resistor between + and the third terminal.
Now, the phone is in boot-loop - repeatedly Nokia logo keeps on showing.
Any ideas?