It is positive that each shaft can be controlled individually and different programs can run. Every time charged batteries can be removed and be replaced by others, while in other wells even batteries are charged. Many chargers load the batteries in pairs, the pairing of two batteries with the same load capacity can then retrospectively itself prepared to use batteries jointly used optimally.
The device is easy to use, it is well made, the materials to make a quality impression. AAA rechargeable batteries have to be used with a little more pressure, they seem to hook something, but if they are locked, they sit properly on the contacts, only if a Schutzolie extends to the bottom over the edge, it could happen that no contact comes about because it sits close to the edge.
The large display is illuminated in sequence parameters and status to the individual shafts are displayed. Operation is simple and intuitive, but assumes you know which program is selected.
Although there are cheaper chargers, but when one considers the benefits, however, that one can get batteries for an extended period, then these costs should soon qualify and you get a very inexpensive device.