Unfortunately I have not read the existing reviews before purchasing this unit. To make matters worse I have the device illness very late after expiration of the exchange-or. Warranty periods may use for the first time. This first use has survived the device also without prejudice. But only this. Been at the second time of the segments of the stocked with blue LEDs displays only as many in operation, that one could interpret the remaining cryptic symbols using only the pictures in the operating instructions. After another 2 recharges should now also the NSA no longer be able to decrypt. The device actually has a fair amount of technical possibilities that are very good for charging batteries. Therefore I had actually bought this thing. But this is the readability of the extensive displays a prerequisite. Fortunately I still have some perfectly ordinary low loader with whom one at least normal loads without difficulty gets back. For the special conditions as refreshen, entsulfatieren etc. I GE me a similarly expensive charger buys. Where there are no problems at all. The saying "from experience well" should the manufacturer regulatory agency, under pain of severe penalties! If there were minus 5 points as an evaluation criterion, I would forgive you immediately.