Fish Finder Powering Off On Its Own

I have used my new Lowrance 527c 4 times, everything is great with it, but yesterday I was out and it turned itself off twice....Any ideas of what or why this could be? I checked all the connections, they look good. I have the finder hooked up to my starting battery, it was reading 11.5 volts, which is a little lower than i normally have it, but there wasnt a problem turning the motor over, so i dont think it had anything to do with the battery. I really hope its not a problem with the unit.

 

Yeah I got a charge now that is about 12.7 volts so hopefully that is it.But it didnt turn itself off while I was cranking the motor...I turned the finder on, back into the water, looked over at the finder to see how deep i was and it had turned off....Then I started the boat later that day to move spots, and a few seconds after I started the boat, it turned itself off again.

 

I just dont want to jump the gun by sending it to Lowrance if its just the battery or a connection or something..I charged the battery and will take it out again to see if it does it again...I got a 1 yr warranty on the finder, and just got it a month ago..If it keeps doing it, I will definantly send it in..We will see once I take it out again..With all the rain we are supposed to get, it maybe a while though:confused2:

 

It seems that the Lowrance models have a feature built into them that automatically shuts then down once the battery gets below 11.7 volts..That was my problem, my battery was down to 11.5 volts, so actually, it is doing exactly what it is supposed to do...I got lazy on charging my batteries, and didnt charge them after the last few times I had gone out...So after finding out thats what it was, it makes me feel alot better. Thanks for the replys.