Reasons to make the switch to A123 batteries for your Receiver Packs:
Safety - These packs are safe. They do not require charging in a bunker box.
Voltage - A123 packs are at 6.6V. This means that you can use these packs unregulated with your servos and receivers.
Storage - A123 packs do not drop voltage in storage to the degree of Nickel based batteries. You do not have to top off these packs before going to the field.
Charge Time - Only 15 minutes to charge!
Weight - Similar to Nickel type batteries
Charger is backlit, easy to read in the field. The BPH 440 is small, easy to use, and priced to fit your budget.