Hi Boner 321, I got back into rc after a 10 plus year lapse and went with 4.8 volt nicads for my recievers(it is what I know). The plus to this is that the charger that comes with your radio will charge them(400 to 700 MAH range). the disadvantage is first, nicads will form a memory and need to be run down(not too much though) to around 1.1 volt per cell before charging. Another disadvantage is at 400 to 700 MAH I am limited to around 3 flights. I will switch all my stuff over to LIFE once it is time to change them out(five years?) I am not sure even if life is the same voltage per cell as nicad, but for me 4.8 volts is all I need as I fly 40 size birds. I have built battery cyclers for all my aircraft so I can simply plug each of my 5 aircraft into a cycler and it will automatically discharge and recharge by receiver battery whith the battery still in the aircraft.