I have recognized with Sanyo Eneloop 2550 mAh and which are 1A and charged in about 5 hours. The accompanying batteries also. Seems to be very compatible with non-Varta batteries ....
The display is very simple: blue light (it lights up blue: -D) and 4 battery displayed with 3 strokes: if the batteries are almost fully flashes logically one bar and the others are on continuously and when everything lights up permanently = battery fully !
1 star: Amazon cockpit Star ;-)
2. Star: Shipping
3. Stern: Product Quality
4 Star: Price / Performance
5. Star: Service
= 5 stars + a big thank you! Very simple, but good device!