i finally purchased a volt meter to keep tabs on the rx and tx batteries. i bought the hobbico expanded scale voltmeter mk II. i have never had any problems with my tx battery. put the tx battery on the charger last night and got up this am to fly. so i use the new volt meter. first of all i plug it in and nothing happens. so i turn the tx on and the needle go up but its just over the red marks and showing almost no charge. so i think that odd i look at my tx and the red low battery light is on. my tx is a futaba t4ybf. and to add to the oddness when i touched the antennea then needle would jump up from 5 volts to 8 volts. and when i pulled the antennea out the needle pegged at 11 volts. i removed the battery from the tx and tested it seperatly. and it reads 5 volts. first of all are you suppose to turn the tx on to get the voltmeter to work? why does the needle go up when i touch the antennea and extend the antennea? why would the battery go bad all of a sudden? do i have a bad voltmeter and did it damage my battery? or could i have crossed the leads and damaged the battery? please i need some help!