Pretty sure everyone else is correct. GHL was unable to find a battery with the requirements necessary in the space available for their vaporizer. They did in fact special order a custom battery.I can guarantee that these batteries are not proprietary to GH. It would be incredibly expensive to get batteries made specific to your device. These are rebranded batteries. 100% there are other types of devices using this size battery. The problem is that this may not be a size that is sold to consumers and only used in industry. If someone can give me battery height and diameter I may be able to find out if there is another source to buy them.
Check out this update from 6 months ago when they visited the factory - https://www.indiegogo.com/projects/grasshopper-vaporizer#/updates
6 months ago
Hey Everyone,
We returned from a long and successful trip in China this last weekend. After spending over two weeks visiting manufacturers and solving problems on the spot, it was obvious that such a trip was necessary.
The Grasshopper battery has been one of the biggest challenges of the project. Its custom size and insane discharge requirements made it hard to design and even harder to manufacture. Naturally, we were excited to visit our factory and see what we had invested in. The results were good. The factory was working on labeling and testing some of our second-batch batteries.
Of course I fully expect we'll quickly see more vendors in China selling the exact same battery under different brand names in the near future as more grasshoppers make their way in to customer's hands.