If you are like me, you had a wireless Apple keyboard where there was AA batteries leakage and the threaded lid won't open. Something definitely to dread, especially when the replacement costs isn't cheap.

I hadn't used my keyboard for a while until I found this. I saw white grains around my desk and realised that there had been a battery leakage (some white corrosion is outside the threaded lid area).

The corrosion joined the parts together strongly in a chemical fusion.
I immediately tried to open it but no methods seemed to work, I used a coin, pliers, a screw driver with no avail.

I followed someone's tip online and removed the bluetooth module cover removes by squeezing the sides of the plastic tube together, which allows a jeweller's screwdriver to get under the rear edge and gently lever it up. I did this but just couldn't make it through to the battery.