This was the hardest part for me. I had successfully pulled out one of the adhesives, but the second one broke and the remaining part of the strip sprang back to hide itself under the battery. So, I heated the back with my hair dryer and then tried the plastic card and dental floss ideas, neither of which worked. Eventually I was able to use the blue plastic spudger to lift just the very bottom of the battery, enough to allow me to grab that remaining strip of adhesive with the tweezers, and then with my fingers. I carefully pulled on the adhesive strip again and this time it didn’t break; the battery came right out.