Thread: Livescope drain on starting battery

Originally Posted by cevans

If livescope is pulling more than 4 amps and your going with a 30 amp lithium, your only going to get no more than 7.5 hrs of run time before you run out of battery power. Everything I have read about lithium, is you never want to drain it down to no more than 20% of the power left in it or it decreases battery life. I think 50 amp would be a better choice, just a FYI.

I generally only crappie fish 4-6 hrs. a day. I tend to agree with you but think I will be alright. I also used the following as a guide:

"You can look up the current draw for everything attached to your battery and add them up and multiply by the number of hours you want to be able to fish without recharging to figure out a good battery size.

I am running my 106SV off of an Amped Electronics 30AH battery. It consumes 26W and a LI battery is around 13V. Thus the current is 26/13 = 2amps. Thus I can theoretically run for 15 hours.

For the livescope bundle the listed power consumption is 21 W typical, 58 W max. That is in addition to your FF power consumption. Thus for an LI battery (13V) that would be 1.615A to 4.462A of current draw.

Thus at max draw (not sure what that means in terms of configuration) fora 10 hour day on the water you would need a 45AH battery for just the livescope (probably overkill). For typical power consumption you would need a 17AH battery.

Thus, for a 106SV + livescope the typical power consumption is 3.615A and for 10 hours of usage you would need a 37AH battery for 12 hours a 44AH battery, etc.

The above assumes you only have the FF and livescope attached. I typed this up pretty quickly so if anyone sees a math error you won't hurt my feelings by making fun of me for it

I will say that one nice thing about LI vs lead acid is that LI is 13.2V to start and lead acid is around 12.6V. As you run them through the day the voltage on the lead acid drops which causes an increase in current draw to compensate. LI batteries are nice because they stay above 13V for almost their entire discharge cycle."

Keep us posted how you do using the lithium. I have all my electronics on a Ionic 50 amp and the 12 v Powerdrive v2 trolling motor on 1 100amp Ionic lithium and after using a couple times may add another 100 amp after seeing the usage on the one.

Originally Posted by cevans

Keep us posted how you do using the lithium. I have all my electronics on a Ionic 50 amp and the 12 v Powerdrive v2 trolling motor on 1 100amp Ionic lithium and after using a couple times may add another 100 amp after seeing the usage on the one.

If it works out that the 30ah isn't big enough could I just add another battery to it, say a 17 or 20ah?