If there?s a better place to post my question please let me know! I?ve had my controllers for over 4 yrs and don?t want to pay $40-60 for new ones. I?ve already had to disassemble one before and am thinking to replace the failing batteries since they are now lasting me less and less time. However I need to know what parameters the batteries I buy need to meet without blowing up the electronics or damaging anything if I can help it. I?ve seen videos of people using bigger batteries for longer life but I?m not that educated to be figuring it out on my own. So what batteries can I use with either the same or greater battery capacity? Please include as much info as you can (voltage, amperage, type, capacity etc. )and how this is what you?d recommend.