Check the model of your case under the blade as opposite So CE0536 or CE0523? Once you know the model of your case, choose the model that suits you using this table (Possibility to see it larger in the photos on the sheet) Here is the difference between the CE0536 model (here on the left) and the CE0523 model (here on the right), the first has a location dedicated to the battery while for the second the battery is directly integrated into your electronic circuit. As a reminder, the electronic circuit and the battery are not supplied; they must be recovered from your old box. Refer to our assembly video to replace your case, we provide you with technical assistance 24/7 in the language of your choice, we will be happy to help you ! First things first Choosing the model The difference between the models Exceptional support!