IFixit adhesive remover is highly flammable. Alternatively, you can use an iOpener to apply a modest amount of heat in order to soften the adhesive before prying out the battery.
This is best done with the help of an iFixit battery replacement kit the liquid adhesive remover in your kit will dissolve the adhesive securing the battery, allowing you to remove it with ease.
Use this guide to remove the glued-in battery from your MacBook Pro.