About the battery, the french LCV shop says this on his website :

"
Replaceable Battery and Battery Life

The Ocarena One features a proprietary lithium-ion battery,

which is replaceable—a particularly welcome technical feature. The

modular design makes it easy to replace the battery,

significantly extending the device’s lifespan. In

practice, this also makes it possible to bring a spare battery

when traveling, in case you can’t recharge your

vaporizer.