The charger does its service reliably. The adapter supplied for charging in the car is very convenient. But: After about a year with a (2 devices) within a short period both !!! Holders of the tension springs broken. For (almost) daily use of the only 300 Battery charges were (per battery compartment). As I quickly needed spare, I have waived the warranty and (provisionally) repaired itself and simultaneously ordered a third unit. Fortunately, the delivery of the 3rd unit was carried out very! quickly. I hope that this defect is just an isolated case.