Hi fellas,

I bought an airplane (.46 size) and radio about 4 years ago. I fly off and on maybe 4-10 times per year, my interest comes and goes. I always charge my batteries over night if I'm going to fly overnight. The problem is, I've still got the original batteries! Just curious as to how long these things are supposed to last? The ones in my Tx read a full charge (on the battery scale on the TX itself)...well, they always have. However I've never tested the battery (4.8 V-600mAh) on my Rx. I've got a multimeter, but have no idea how to use it or if it'll even tell me anything I need to know. Can anyone tell me the proper way to use this thing and how to determine if it's time to replace these batteries?

Thanks!