WS lithium battery on sale at WM for $57

Excellent deal if you can find one in stock.
https://www.westmarine.com/wilderness-systems-lithium-battery-18774851.html

Just my experience, however, I picked one of these up years ago and it didn’t last a full summer before failing.  Not sure if other people have had better luck than I did.  That said my Ionic blue 12ah lithium with a Bluetooth connection app that lets you know its charge status as well and specs while it’s charging, amperage, voltage etc. has been serving me for the last three years no issues.  Runs my helix 7 from 6am to 2pm with half a charge left.