I need to get a separate battery for my Livescope/fish finder. 99% of my trips are 4hours or less. I can get a Dakota 12 10ah battery with charger for $100. It's my understanding that I should be able to get 6hrs out of this battery running my Livescope setup. Can anyone confirm this. The next size lithium batteryis twice the price without the charger. I will more than happy to get 4hrs out of a single charge.