OK, just wanted to report back. I talked to Jason at LDSreliance. He dang near answered on the first ring, which shocked me. Turns out he also has a Youtube channel and is somewhat of a battery and solar expert or something. Anyways, he was nice enough to talk to me for about 45 minutes about my boat and needs and issues. He even looked up the specs of my Lowrance Elite to make sure I will have enough juice for it as well as the trolling motor.
He also sells some other batteries that have Bluetooth that I am considering, but I digress. I can't vouch for the batteries but the dude was helpful and knowledgeable and I didn't have to wait until 3am for an email from China with a bad English translation. I'll never buy something like this from Amazon again.
Thanks for the help all! I'd still love to hear from anyone that actually has or knows someone that has these MillerTech batteries if there is anyone on this board that sees this. I did a search but didn't turn anything up.