@jurajstefanek you've got a lot going on here with your phone. What concerns me is the issue with the new battery. There is no reason that the new one does not work, while the old one does. I would just once more get a new battery. Just in case there are issues with your recent purchased one. The temp low can actually originate from the battery sensor. The other issue can be a failed component in the Charge Temp circuitry. You may want to check RT1601. Also, U1601 is the PMIC for the charging etc. (not the low temperature).You could try a quick reflow and see if that makes a difference.
[image|3053239]
[image|3053232]
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Let us know what voltage you show on your battery connector when the charger is connected and when it is disconnected.
@jurajstefanek you've got a lot going on here with your phone. What concerns me is the issue with the new battery. There is no reason that the new one does not work, while the old one does. I would just once more get a new battery. Just in case there are issues with your recent purchased one. The temp low can actually originate from the battery sensor. The other issue can be a failed component in the Charge Temp circuitry. You may want to check RT1601
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@jurajstefanek you've got a lot going on here with your phone. What concerns me is the issue with the new battery. There is no reason that the new one does not work, while the old one does. I would just once more get a new battery. Just in case there are issues with your recent purchased one. The temp low can actually originate from the battery sensor. The other issue can be a failed component in the Charge Temp circuitry. You may want to check RT1601. Also, U1601 is the PMIC for the charging etc. (not the low temperature).You could try a quick reflow and see if that makes a difference.
@jurajstefanek you've got a lot going on here with your phone. What concerns me is the issue with the new battery. There is no reason that the new one does not work, while the old one does. I would just once more get a new battery. Just in case there are issues with your recent purchased one. The temp low can actually originate from the battery sensor. The other issue can be a failed component in the Charge Temp circuitry. You may want to check RT1601
[image|3053236]
[image|3053232]