Phondly

It depends on the injetion molding costs the PCB price and the packaging. I plan to keep the price between 50 to 100 US dollars but it is without battery to be able to send overseas easily. But I also plan to provide a very detailed instruction for Battery creation from locally available parts.

Bit of the specs: - Integrated 2 cell LiPo USB charger and power path management IC - one green LED for charge indication - The charger is set to a maximum current of 1 A, but can adapt the charging to the capabilities of the USB power supply - charger has battery temp sensing in charge, thermal regulation and shutdown - The user can choose with a small switch if the output boost converter is on (it is like a corded working mode) or turned of while the Battery is charging - 10 A capable boost converter on the power out side configured to produce 9V 3A continuous output The Battery safety electronics is in the battery pack and has overcharge, over discharge, under-voltage shutdown capabilities (it is a cheap but efficient Chinese BMS electronic)

Hi Thorsten, Glad, you like it. The electronics contains a charger circuit which works from USB3.1 port. It’s just a prototype (currently I only have a 3d printed box), I’m looking for mass production opportunities. Best wishes, Gergo

I know this is an old topic, but I have been working on this project for almost a year. So if anyone ever looks in, here's a picture of the developments and a link for a short intro video.