We have a 2017 Raleigh Sprite IE. If the slide out battery is the same as yours. There is just a small metal tab on the bottom of the battery that catches the tray. If the key is not turned all the way it will not fully release. Even when it does, I have to give a good tug to release the battery from the controller. Our 2016 iZip E3 (also Raleigh) works the same way.