Has anyone experienced any severe battery drain, overheating while idling and loss of battery capacity despite not having more than 600+ charge cycles after the June update on the NP2? For those who are going to say that the battery degraded due to LT usage, my answer to you is how did it degrade within a day after an update?
For some context, a few weeks back on 19 July, I updated my NP2 with the latest June patch at 1:48 PM. Expecting it to function normally after an update, I left it aside and continued with my routine. When i returned back to the phone after a few hours, the battery percentage was lower than usual. Additionally, the phone was overheating while idling. Before the update, the battery would only drain 1-4% after a few hours [3-4 hours] but now, it drains about 7-12% while idling with screen off.
Due to that, i went and take a deeper look at the battery stats. So couple days back before the update on Wednesday, the battery drain about 2-5% from 2am-8am with 8 minutes of usage (Reference [a]). After the update on Saturday, the battery drained from 38% to 27% starting from 2PM - 8PM with 10 minutes of usage.
If the data is not enough to substantiate the rapid battery drain, you can take a look at the Tuesday data on 15 July (Reference ) [Before update] vs Tuesday data on 22 July [T+3 days after the update]. The battery drain on Tuesday [T-4 days before the update] was 20% in 6 hours with 1 hour and 19 minutes of maximum usage as compared to Tuesday 22 July [After the update] with 80% of the battery gone in 9 hours with 1 hour and 18 minutes of maximum usage. This usage trend shows about a 2.6x increase in battery usage while having the same usage time. When the data is translated to battery drain/hour, the battery drain before the update was 3.334%/hour as compared to 8.89%/hour after the update with delta-t of 5-9 minutes.
I wanted to post this a week ago but had forgotten about it. At this moment, the battery degradation has gotten worse and the device would occasionally shut off around 30% charge. Also another issue is that the discharge rate of the battery is 2-3x higher at idle after the update as compared to before. It used to be around 100-300mA but now it would hover around 900-2000mA. (Reference [c])
Additionally, some might point out that i have 2 5G+ sim cards active which may affect the battery performance but i have been using my phone with 2 sim cards without any battery issues before the update. Final details to add, the phone would heat up while idling even though nothing was happening in the background. Also apparently, the OS would report the battery charge as 100% despite it showing 80% charged in AIDA64 which aligned with the charge limiter before the update. It used to charge up to 100%, or up to 4650mAh so I speculate that a bug had occurred which overwritten the OS battery capacity with my charge limiter. [Calculated the percentage by dividing the total capacity by the charge counter] (Reference [d])
All respective images will be uploaded including additional ones. Also i will be emailing to the Nothing Team for them to investigate this issue because i highly doubt it is an isolated case because it takes a while for batteries to degrade to this degree. For those who are wondering if Bitdefender is the cause, my answer is no, because it was already install since day 1.
Hopefully someone from the Nothing Team can roll out a patch asap because it is affecting my work and causing me some financial losses
[Reference files (a): [16 July] Wednesday Battery Health [Chart] - 2.2.png, Wednesday Battery Health [Chart] - 2.3.png, Wednesday Battery Health [Chart] - 2.4].png]
[Reference files (b): [15 July] Tuesday Battery Health [Chart] - 1.png -> 2.3.png, Tuesday 22 July Battery Health [Chart Aft Update] - 1.png
[Reference files ©: Screenshot_20250721-100137.png, Screenshot_20250721-100219.png, Screenshot_20250721-100308.png, Screenshot_20250721-100318.png, Screenshot_20250721-100537.png, Screenshot_20250722-123733.png, Screenshot_20250722-124309.png, Screenshot_20250723-184935.png, Screenshot_20250724-203932.png, Screenshot_20250724-204013.png]
[Reference files (d):Screenshot_20250722-124321.png, Temp-Reference20250729-225905.png]
