Monitoring LiPo battery "level"

I have a Hotwood's 510 Little Sport on order, which will be powered via trolling motor. I will be using a Dakota LiPo 54Ah battery (at 70, I do want to pop a gut picking up a battery). I usually do about 2 to 3 hours of fishing before having to head in and take a nap, and figured the battery would do fine. BUT, in case the fish start jumping into the boat and I stay out longer (bladder willing) is there any way I can check battery level so I don't have to dog paddle the pontoon back to shore?

Thanks!

Search Amazon.com for "monitor LiPo level" - should find several inexpensive digital monitors there.

https://www.ebay.com/i/293937257626?...e9609c5f7058e6

Amazon.com

Amazon.com

I use a similar one(looks exactly the same) from Amped Outdoors and very satisfied with it.
I've chosen one of these over the Victron Smart Shunt bluetooth (which i returned)because these have a digital display not the mention a 1/3 of the cost of the Victron.