For large consumer rechargeable batteries is clearly good stuff. The main types of batteries are accepted and can be recharged in 4 simultaneously. The argument of the loading speed is the main asset that time announced 1 hour or a bit optimistic: I tested with 2 AA and 2 AAA, here are my steps: 1:15 to 1:45 for AAA and AA knowing that the manufacturer announces increased speed for loading AAA when combined with AA, which was the ... my test case for this remains still VERY FAST. That said, it takes 2 or 3 charging / discharging cycles for the batteries are at maximum performance. The case is still quite bulky (height: 59 mm Width: 156 mm Depth: 101 mm) and must be added the cord and the transformer .... whether it's to go! The meaner remains that for the price, no batteries are supplied with ... disappointment on this point.