Battery efficiency with Smart Lock: Bluetooth or NFC?

[EliezerB]

On Lollipop, if I use Smart Lock to keep my phone unlocked, which is more efficient:
- to have it sit on top of an NFC tag
- to have it in range of my PC's Bluetooth
?

Thanks,
Eliezer

 

[itguyjax8430]

On Lollipop, if I use Smart Lock to keep my phone unlocked, which is more efficient:
- to have it sit on top of an NFC tag
- to have it in range of my PC's Bluetooth
?

Thanks,
Eliezer

Welcome to Android Central!

I would think either one would be efficient, they are both set to use low energy.

 

[EliezerB]

Right, I'm sure they both consume relatively low battery - my question is which uses less? I'm sure one of them uses less than the other; I just wasn't successful in Googling which one it was.

And just to clarify: when I mentioned "to have it sit on top of an NFC tag" - I mean have it physically sitting on top of the NFC tag all day.