A user found a way to charge a 'dead' Pro1X!!! (confirmed by others)

[EskeRahn 5,471]

@Pro1-X jim I split your issue with a not working display into its own thread here. We have other threads on that too, So I might find one and merge them.

[cash 12]

On 7/2/2024 at 6:21 PM, raymo said:

quite easy...too late for me but good to know 😄

I measured 3,20V on the battery connector at red flashing state, is this voltage the very low battery state ? I thought it was more around 3V, but probably depend on battery model/technology

Also I inject 4,1V direct on the battery connector, and in about 30s I had 5% battery, so this trick is very good !

Did you have the red notification light flashing about once per second when trying to charge it?

This seems to be the status of mine too. It's drawing constant 50mA, but even after leaving it for 24 hours, it will not boot.

The rubber band trick is also NOT working for me. I tried several times, leaving it for over 24 hours for one attempt. So I'm guessing you had to disassemble and connect a bench PSU to the battery connector?

[raymo 179]

On 12/2/2024 at 12:39 AM, cash said:

Did you have the red notification light flashing about once per second when trying to charge it?

as far as I recall, yes, the rubber band trick had probably worked in my case but came too late in my knowledge.

On 12/2/2024 at 12:39 AM, cash said:

The rubber band trick is also NOT working for me. I tried several times, leaving it for over 24 hours for one attempt. So I'm guessing you had to disassemble and connect a bench PSU to the battery connector?

Yes

You can also measure battery voltage, but if you fall under 3 volts your battery is probably dead.

Be carefull if you want to disassemble it.

[cash 12]

On 12/5/2024 at 6:39 PM, raymo said:

as far as I recall, yes, the rubber band trick had probably worked in my case but came too late in my knowledge.

Yes

You can also measure battery voltage, but if you fall under 3 volts your battery is probably dead.

Be carefull if you want to disassemble it.

What do you mean by "be careful?"
Just that things are easy to break?

[EskeRahn 5,471]

8 hours ago, cash said:

What do you mean by "be careful?"
Just that things are easy to break?

AFAIK the most likely to be damaged is the cable to the fingerprint reader, at the initial opening of the lower half.

[raymo 179]

There are also some antenna connector on the back (usbC connector side) who connect lower half with upper one, as a ground for antenna if I understand correctly. I recall that @claude0001made a picture in another post, but don't find it anymore.

This is a bit tricky to dismount, but doable. Be cool.

[Hook 3,043]

So, this is strange.  Somehow, even though it was actually connected to power, charging overnight, when I went to check my Pro1x yesterday, it was completely drained of power.  Which is weird... even if the magnetic cable had come loose, I can't see it draining over night.  I was busy yesterday, so I didn't discover it until the end of the day (yes, I actually have days where I don't use my Pro1x, but remember, although it actually seems okay at making calls, I use a Pixel for calls and point and shoot camera and my Pro1x for everything else).  So, this just seems weird, especially as I have a back-up Pro1x that I don't use and haven't installed anything on that I only have to charge every 3 weeks and it still never drops below 70%, lol.

So I have had it on a rubber band now for 24 hours. It still hasn't booted, but I have confirmed it has charged to 21% (it was 3% yesterday) but still isn't drawing enough to maintain that with power hooked up. So I think mine will be one of the 48 hour edge cases. I'll just keep it going until it shows signs of recovery.  I think it will get there, but I'm really curious what could have caused the battery drain.  Is there some other aspect to this bug with the battery that can result in sudden discharge. Probably just I was careless on a couple of really busy days, but still odd.

[Hook 3,043]

I had just posted a "I give up on this" post as endless hours on rubber bands seemed to not be producing results.  But then, just to spite me, lol, it booted.  It was about 22%, I plugged it in and it began losing % again.  So I quickly swapped  in a fast chard 20000mAh Anker external batter and for the first time got the rapid charging message and it is up to 30%.  I think this may be a problem with the Pro1x's charging brick.  Which would explain how it got drained while attached to the charging brick (I tried different cables, so I think it's the brick).

More when it gets fully charged and I make some more tests...

EDIT: Somewhat later. So everything is working again. The Pro1x is fully charged (85%) and it is holding the charge and the brick is able to maintain it, just like my Pro 1.  The rubber band worked but it seemed incapable of getting the phone past about 22% and the brick seemed incapable of providing enough charge when the battery was that low to keep it from losing % but a rapid charge exterior battery worked.   So seems to be an interaction here.  At proper charge levels, the brick is capable of doing maintenance charge, but at some low value is not delivering enough charge to handle maintenance charge.  Not being much of an expert on batteries and charging, I have no idea if these observations make sense.  I still have no idea how the Pro1x got fully discharged, but it must have somehow crossed the line where it was no longer getting enough charge to maintain much less recharge.

If someone who knows what they are talking about has a theory here, I'd love to hear.  I don't even know how to use a multimeter. Lol.

But, for now, my Pro1x is back.  As long as it behaves now, that's all I need to know.  😄

EDIT2: It's the brick. The Pro1x started loosing % plugged in and I noticed when I plugged and unplugged, I would get the lightning bolt for a few seconds and then it would go away. I tested with the brick my Pro 1 uses and that didn't happen.   So I pulled out the brick that came with my other Pro1x and it also worked, retaining the lightning bolt.  I hadn't noticed this detail when the Pro1x was fully charged.  So I have given my old Pro1x the charging brick from the new Pro1x.  Something is just failing in the old charging brick. 

Hopefully, I'm done here.  Lol.