Quick update if there are any watchers of this post, or if anyone in the future is looking for answers to a similar question. I have received two quotes, one from the US 'SmartBattery' and one from China 'OSN Power'.
Smart Battery Product...
Thank you all for your great input and cautions! I have reached out to OSN and they said they would get back to me tomorrow.
@Fetcher- you mentioned the 'housing' of the battery. I notice that almost all American suppliers use housings on their batteries, while almost all Chinese suppliers...
Dear Forum,
I am working on a small startup company that uses 40AH-50AH 12V LiON batteries. So far I've been using examples like this one: https://www.lithiumion-batteries.com/products/product/12v-40ah-lithium-ion-battery.php
It's almost $600, which is a similar price to most of the options...