I’ve studied the charging of the NOTHING phones have a CMF1 now and a NP3. My partner has a OP12 and had a OP7T before both with WARP charging. I also have around 10 other chargers around the houses/offices.
I find that when a phone does reverse charging it won’t charge correctly on some chargers. This is the WARP charger (both CMF1/NP3 drain battery when using it). Hilariously, even a standard wall socket like this one drains the CMF1/NP3 battery with USB-A only. Good thing I put them around my house at £30/each.
I tried the CMF1/NP3 in another charging block I had and it didn’t work either.
I find that all QC3.0/PD devices work correctly with a 10W max charge.
I find that all PPS-equipped devices work correct up to 30W (CMF1 and NP3) with a 30W Anker charger.
I install AccuBatteryPro to monitor what the battery is doing on what charger.
TL;DR: Warp Chargers drain my CMF1/NP3 due to the reverse charging (usually between -2A and -4A) option on the phones.
edit: here is another example of it draining even when I turned off battery share in the battery options on my CMF1.
https://nothing.community/d/23256-how-to-disable-reverse-charging-on-cmf1