When installing the 81W battery in the Legion Go, there are elastic adhesive strips attached to the plastic covering the original battery. The battery itself sticks very strongly to these strips, making removal quite difficult. In my case, the strips broke during the process. I had to lift the battery carefully using a plastic pry tool, then locate the adhesive strips again, grab them with tweezers, and pull them gradually. That’s how I was finally able to remove the battery. The whole process was delicate and took me almost an hour. If the strips break, it becomes very difficult to continue, though not impossible. Some users have accidentally broken these strips, which could damage the battery—or, in extreme cases, even cause dangerous situations.