Definitely one of the best chargers I have ever owned. I like the light blue display that shows the battery's current charge level and whether it's charging or discharging. I have a battery fully charged up to 8. NiCd and NiMH and 600 to 2500 mAh, both AA and AAA. The instructions give an indication of how long (on average) it usually takes to charge. , but only up to a 2300 mAh battery. The instructions do NOT cover when you should use the "Refresh" button, which puts the device into "Discharging" mode before it goes into "Charging" mode. I wish it explained this function better. I particularly appreciate the 8 charging slots. Saves me time and effort. Remember to PUSH the battery until you hear a "click" or "click". Otherwise it will not be fully discharged.