8 Care, maintenance and recyclingTo insure the s-max sella safe and proper functioning we recommend a safe-ty check done on the device every two years, even though there might not beany outer damage or malfunction evident.F In the interest of your safety repairs of any kind may only be done bypersonnel authorized by AAT Alber Antriebstechnik GmbH. We arehappy to inform you about the contact address of the dealer closestto you.The device itself (as opposed to the batteries) does not need any particularmaintenance except for an occasional cleaning (see chapter 8.7).8.1 New userIf the device goes to a new user, we recommend a safety check.8.2 ChargerPlease exclusively use the AAT Alber Antriebstechnik GmbH charger to char-ge your battery packs.8.2.1 Automatic chargerThe charger does not need any particular maintenance. The scope of deli-very includes the AAT Alber Antriebstechnik GmbH charger. Plug å is in-serted into the wall outlet and plug ç into the socket on the device or thebattery pack.This automatic charger recharges your batteries 100%. As soon as the char-ging process is completed, it switches to a retaining mode, thus overchar-ging is impossible.F Before using the charger, please read and follow all instructions andwarning notes included with the charger.F Exclusively use the AAT charger to charge the batteries.F Check the charger regularly and protect it from oils, grease, aggres-sive cleaning agents, thinners and/or damage by sharp edges, etc.F Repairs and service check-ups may only be performed by AAT AlberAntriebstechnik GmbH or their authorized personnel.F Please do not disassemble or modify the charger!F Please make sure that the charger is not exposed to dampness or hu-midity while charging the batteries.F Never touch the plug with moist hands!34s-max sella · 160 kg