gary

jr servos made in this century have no problem with 6 volts ( actually up to 6.7 with a top charge )....i cant say about anyone elses but i have heard a few no no s about some other manufactures


the big bird guys use regulators ( at 5.7v ) with 6v packs not because the servos cant take it...but because they are so good they can feel the loss of top charge and it affects their performance thus by regulating they can get a constant power flow from the beginning to the end of a flight

hope this helps

hornetdriver