I have a 16 volt 18 amp hour battery from amped outdoors that i use for my uhd 93 sv & livecope system & it's been great. I charge it every time as soon as i back the boat in the garage along with my starting & trolling motor batteries. It's always above 16 hours when first turning the system on & i run it about 10 hours per trip & it's still 15 volts or just under in the high 14 volt range if i run it 12 hours.