3.7V, 13600mAh, Li-ion Battery fits Geo-fennel, Fl 500, Fl 550, 50.32WhBattery Fits Models: Fl 500, Fl 550, Flg 500, Rotationslaser Fl 500, Rotationslaser Fl 550, Rotationslaser Flg 500 Battery Part Numbers: 10 05507 Our battery should have the exact dimensions and fitment as the original battery; the fit and finish are checked before dispatch. Our equivalent battery is made with premium cells and is rated as shown in the specifications on the product page. If in doubt check us out! We will select the correct battery for