Battery drain after switching to new phone

[yarnsrj]

I know this has been beaten to death but it's a new one for me... That being said, I recently transferred service from my 2.5 yr old Verizon variant galaxy Note 3 to my new Note 5. I do still use my Note 3 on Wi-Fi because I have old games and my ebooks on the phone. However almost immediately the battery drain in my Note 3 has turned into crap. Most of the battery usage is "phone and cell standby" and I'm not sure why as I've not seen that kind of usage when I had service on the phone. I use the phone minimally and within a couple of hours more than 50% drain, and by the end of the day ( 12-14 hrs) it shut off. Can someone explain this usage all of a sudden and what does "phone" actually mean if I no longer have service on this phone Here is a screenshot

 

[B. Diddy]

Verizon phones don't use a SIM for cell service, so it may be that the phone's CDMA radio is still trying to latch onto some kind of signal (even though the phone is no longer activated on your line). Since you only use the phone as a wi-fi device, turn on Airplane Mode (which turns off all radios including the cell radio), then turn wi-fi back on. The cell radio will remain off.

 

[yarnsrj]

Thank you for replying. I misunderstood your instructions and initially I didn't see any improvement, but I reread your instructions and realized I am to leave "airplane mode" on and then turn Wi-Fi back on. I will post back later. I never realized I could use Wi-Fi with airplane mode enabled because I didn't have Wi-Fi at my job.

 

[yarnsrj]

B.Diddy, a thousand thanks. Worked like a charm. Thanks for always being quick to share your knowledge.