Java Energy - Claiming low temp heating and bluetooth monitoring on the Cheep

Java Energy Smart batteries showed up recently on Amazon $339 for 100ah. Nothing else in this price range seems to be offering low temp charging (heated) and Bluetooth BMS monitoring. This almost beats my diy cells. Thoughts?

I don't see much for web presence, youtube reviews are thin, and it's hard to trust a couple Amazon reviews...

@Will Prowse Possible teardown candidate?

Not bad, but man these cheap batteries are endless. There's like a hundred companies now selling these ?

Very similar to the Weize battery advertising. I wonder if they are the same company.

I have the JavaEnegy 12v 100ah smart battery.
It seems to work as advertised. It even has a JBD BMS that works with OverkillSolar BT app. I believe these are same as LPFMAX batteries. The bluetooth app they link to list lpfmax.com as website. NOTE: Beware, the website no longer works. Appears to be made by Guangdong Tian Qin New Energy Co., Ltd using names as JavaEnegy and LPFMAX.

Bought one of these last year for a horse trailer/RV application and it appears to work well so far. Seem like all the features you would want (heating, low temp cut off, and bluetooth management) in a better value than Li Time or other budget batteries. Might grab another for a boat.

Well I don't think there is much price difference between these batts and batts from SOK / Epoch / SFK / AO Lithium they are almost the same price and they all are using JBD bms units.

Yeah Java 300AH smart is 1k + sales tax or you can get the SOK 280 for $1k from SOK directly and pay no sales tax both have free shipping. The 275EX from SFK is about $1100 shipped no sales tax and the epoch 300 essentials is $1160 shipped + sales tax.

The savings to risk ratio is no longer there IMO, I won't mention the possibility of grade B cells in the java but I would suspect they are.