Detach the connector to the motherboard.

Next pull firmly on the two small black tabs protruding from underneath the battery. This stretches the adhesive strip and separates it from the battery and the motherboard.

CAUTION: This strip is easily ripped when under tension.

If it does rip then a sharp flat piece of metal or a knife should be used to cut through the remaining strip.

WARNING: This adhesive is very strong. Too much effort, prying or careless cutting may break the motherboard. The torn cover of the battery in the picture shows how strong the sticker is.