I have the opportunity to trade my dacota lithium 12v 100ah battery for a dacota lithium 12v 54 ah battery and wondering if the 54 ah would be enough for my motorguide Xi3 pushing a loaded bonafide ss127 kayak?

I currently have the 100ah and its just to heavy for my liking. I have had some back surgeries and I would feel more comfortable with moving a lighter battery around instead of the one I have.

Would the 54 ah be enough with as much thrust as it has? Im never on the water more than 4 hours at a time.

I was planning on selling my 100ah and looking for a 60 ah but this opportunity came up to trade for the 54 ah and curious if its enough.

Thanks!

for 4 hours and assuming you're not making long runs at full speed then you'll get by at 4 hours but you will have to keep an eye on it.

I don't know the xi3 power draw, but the minn kota in the autopilot was 45# thrust and the autopilot boat is heavy. At full speed it was drawing around 40A. If yours is similar, that would give you about 1 hour of full speed run time and have 14 Ah left. I don't remember if Dakota publishes the total capacity or usable capacity but the difference is 10%. Assuming they are rating on actual capacity, then you lose about 10%, so 5 Ah. That means 9AH for 'fishing'. For reference, one of my lakes is an electric only and a bowl that I start fishing from the ramp and never make a run 'across' the lake. So it is just fishing speeds. I would burn 9 ah in a 4 hour morning of just moseying around the lake with modest wind. That would cover about a mile to a mile and a half.

Add that all up, and you could launch, motor at full speed for 30 minutes (1.5-2 mi), fish around a bit, and motor back. And your battery would be empty at the end with no buffer. For me, that's too tight but you know your lakes better than me. I used an 80 ah.

looks like you are considering the 54ah compact at 14#. LiTime offers a 100AH 12V ultra compact that is only 19#. I know that's not swapping the offer you have, but something to consider.

This is helpful thank you. My trolling motor is apparently 55lbs of thrust.

I looked a little and it was recommended to not go any less than 80ah because of the motherboard i guess.

Unfortunately I don't think the 54ah is going to be a good trade for me after researching a bit more.