ORIGINAL: Electrolight
Charlie P thats BS.
The only difference between a 4.8 volt and 6 volt batterie is the six volt gives you more torque. (mostly for bigger servos)
As far as how much time you have till the batterie is dead, that depends on the maH rating. ( The higher the maH rating the longer the batterie lasts)
An the difference between a NiCd and a NiMh Is that the NiMh usually has, on average, a higher maH rating. And they are much more forgiveing when charging partially charged. And NiMh are slightly heavier.
These are the main differences. Good luck
Electrolight
Thank you for the whitty rebuttal. You really should also fire off a note to Futaba to change the wording on page 10 of the 9CAP/9CAF Instruction Manual:
"5-cell (6.0V) receiver battery packs - All Futaba airbourne equipment (except that which is specifically labeled otherwise) is designed to work with 4.8V )NiCd 4 cells) or 6.0V (Ni-Cd 5 cells or alkaline 4 cells). Using a 6.0V pack increases the current flow to the servos, which accelerates their rate of response and their torque. However, because of this faster current draw, a 5-cell battery pack of the same mAh rating will last approximately 3/4 the time of a 4-cell pack."
Just repeating what I thought I knew.
And I did say: "If you want longer flights at 4.8v go for a pack with more milliamp hours (mAh)."