The device loads Eneloop batteries einwandfrei- and not one uses the Quick modes also gentle with little heat generation. So much for the better. What bothers me: The unit is in charge of 4 AAA batteries an annoying, pulsating Fiepgeräusch of itself. If you load only 3 or less AAA batteries or 4 AA batteries, this noise does not occur. Individual case, it is also no - there are many reports on the internet about it and my two at various retailers gakauften Chargers fiepten both - even a particularly loud, so I had to give it back. What still bothers me: the charger will not or only a few seconds and thus not reliable invites brand batteries (normal, not with extra low self-discharge) other manufacturers partially, although these batteries are working properly and to easily load with two other CPU brands chargers and can use long (ie no battery defect or infirmity). If you have only Eneloop batteries, the unit is worth perhaps set with batteries. Otherwise, I would rather buy for about 20 euros a more universal charger that invites not only Eneloops, but all sorts of batteries from other manufacturers carefully and completely.