A simple AliveCor Kardia case to protect the pads from discharging (prevents contact of metal between the two pads, runs down the battery)
V2 is an easy to use version with push out opening.
V2.1 is an easy slide-out version with push out opening.
My Kardia has a plastic case that covers the battery side. This case covers the pads. Place it Pads down into the case.
The second and third pictures shows V1. I rounded the corners of V2 and V2.1 to make it more comfortable to hold/use.