I buy this battery for my radio (mt4), when I see the C they are 25 in C. My other batteries for radio and receiver are 8c and 10c. I need to know if I can use the 25c in the radio, or in the receiver, thanks for the help.

I believe the C rating is what the battery is capable of putting out in amps. As long as your radio is rated for the voltage of the battery you'll be fine. Radios don't pull a lot of amps so they don't need a high output battery but it won't hurt it if you use one.

The C value is the max (peak) discharge current. 25C stands for 25x capacity, in your case 2.4 x 25 = 60A. I think your radio dos not need that amount of current

no his radio doesnt but if the voltage is fine for it go ahead it will only pull the amps it needs the battery doesnt push amps the thing it is plugged into pulls them

The radio is the airtronics MT4. I have a protek lipo in the receiver, it has only 8c, I can use it in the radio, but the question is if I can use the other battery (25c) in the receiver, my servos are hi voltage.

as long as the receiver can handle a 2s lipo yes you can use it it will work well