I’m sad to say that the Deathstalker keyboard drops connection for me aswell. I Don’t use synapse, but I notice the loss of connection from flickering numlock light: when connection drops, numlock light also goes out and when the connection re-established the light comes back on. 

I use the keyboard on my lap on a recliner and I think my issue is, that the wireless receiver of the keyboard is located in the middle on the keyboard on the backside and when on my lap, my body blocks the signal.

I can easily reproduce the connection issues by moving the dongle further away and putting the keyboard on my lap. I can reconnect the keyboard by lifting it off my lap.

I also have basilisk mouse, and that never had any connection issues.

 

I have exactly the same problem. And with a Basilisk mouse. Although I run synapse.

i feel like the metal shell is a factor here, and the cutout for the antenna is too small and the  combo kills the range.

i have zero problems when I move my rig into my office and have the keyboard much closer. 

There seems to be a new firmware for the Deathstalker: https://mysupport.razer.com/app/answers/detail/a_id/6249

Just installed it. Testing it out

I’m not expecting much, but I’m hopeful. 

And is it fixed?

I also have problems with getting the keyboard get in standbye sometimes, and it drains the battery, and the delay in waking up after a couple of minutes idle is really frustrating, that you first need to touch a key and then can type while you want to type immediately.