What happens when the battery dies?


Hi there! I’ve just bought a couple of Zymkeys and I’m really excited to try them out. One thing that occurred to me is - what happens when the battery dies and perimeter integrity is set to delete? I’d like to be able to change the battery without bricking the device. Is this possible?



On the zymkey 4i, the tamper detect circuits are inactive when the battery dies. At this point, you can safely change the batteries.

Having said that, there is currently no way to know when the batteries have died. Our future Zymkey 6 will have a battery status feature.

Also FYI, nominal designed battery life is 2.5 years on the 4i.


But once the battery is on again, I imagine that the perimeter will still be breached so that I can access the battery, so it would immediately detect it as a breach. Or am I misunderstanding something?


You are correct, unless you design in some way to connect the tamper detect loop(s) prior to closing up your enclosure.