For many MFLB buyers, either the Eneloop or Maha Energy Imedions are good. They have the advantage of holding a charge for much longer than most batteries. This is good since it ensures that the batteries can be delivered to the purchaser charged, even if the Launch Box happens to be sitting on a retail store shelf for a while. Many people seem to use their MFLB on an occasional or infrequent basis, and for these people, having batteries hold their charge for months is especially advantageous. One downside of the Eneloop batteries is that they should not be charged in fast (15 minute) chargers, as this can decrease the life of the battery.
For people who generally use the Box every day, or multiple times every day, we also recommend the Maha Powerex 2700 mAh batteries and the Energizer 15 minute charger. People who do this will need to be very sure to keep track of which batteries are which—this is important. Otherwise, get a Maha charger—you cannot go wrong with that one (although it is pricey) or alternatively, use the charger that ships with the Launch Box (which will also charge any NiMH batteries). For those who simply want to use their Launch Box and not worry about batteries, additional cells and chargers are available at our Online Store that are sure to work correctly with your Launch Box.