I have a Hobbico Nexstar (aprox 4 months old) that came with a Nicad 4.8V 600ma battery pack. The older guys at my club told me not to fly once the voltage dropped below 5.0 on the meter. This usually happens after 2 or 3 flights. Can I change the battery out to something with a higher amperage and would that then give me more flight's (hold the voltage longer) ? Like a 4.8V 1000ma if it even exists ??

Thanks!