Well, IMHO, it all depends on how much $$ you want to spend. The low-cost option is NiMH or NiCD because you don't need regulators. But if you want to spend a bit more $$ go with Li-ions. You will have to use regulators but you will have a constant 6.0 volts to the servos. If you use digital servos, you should use more battery capacity (i.e. use a 2800 mah vs a 1500 or 2000 mah). Yes, you can use Li-ions all the way around with no problemo except that you will, like I said above, have to use regulators. Overall, the Li-ions are lighter than a comprable capacity NiMH or NiCD.

Brand-wise, there are now many different companies that sell Li-ions. Which ever brand you use, I highly recommend that you use their charger because you definitley don't want to overcharge the batteries and using their charger that is specific for their battery should work very well.

The two brands I see used the most (I'm going on a limb here) are Fromeco and Duralite Plus. I use all Duralite Plus myself and others have used the Fromeco with no problems. It's your choice.


Good luck,

Bobby