What is happening
RF Entangler does nothing but gobble up power.
Tested with Mekanism, EnderIO, RFTools, and ExtraUtilities.
Video Link with my testing here for proof
I have not placed any exciters or anything like that, only the two cells you see in the video in my inventory.
How to reproduce

1. Place entangler
2. Try and put power into it.
3. Watch as all your power fades away.

Expected behavior
It to work lol.

Version: [1.12.2-2.0.17]
Mod pack: [Custom]

Thank you for this bug report.
It should be fixed in the latest version (2.0.18)
Could you verify that it is now working?