USB (Quickcharge 3.0) Adapter for Einhell Power X Change Battery

thingiverse

I created this adapter to extract four Quickcharge ports from my Einhell battery, effectively transforming it into an extremely powerful powerbank. With this setup, I can quickly charge four smartphones or utilize four TS80 tools (the successor to the TS100) at a rapid pace. Edit 2019-07-19: After testing with the TS80 using Ralims Firmware, it works flawlessly at 12V. BOM: * Four QC3.0 USB DC-DC Buck Converters https://www.aliexpress.com/item/QC3-0-QC2-0-USB-DC-DC-Buck-Converter-Charging-Step-Down-Module-6-32V-9V/32887717476.html * Crimp male spade connectors https://www.aliexpress.com/item/100pcs-50pairs-6-3mm-16-14AWG-Female-Male-Electrical-Wiring-Connector-Insulated-Crimp-Terminal-Spade-Blue/32846771914.html * Four M3 screws, measuring 6-12 mm in length * Some hot glue I printed the adapter without support, but if your printer is not well-suited for bridging, you may need to add support. The top of the adapter holds the USB modules securely in place without requiring any screws. For assembly purposes, I applied hot glue to secure them firmly onto the top, allowing for easy attachment. You'll need to remove the plastic inserts from the USB jack (see photo). I've also included a version with only two ports and the Fusion 360 project file. PS: Upon closer examination, it appears that purchasing an Einhell battery solely for this purpose may not be cost-effective (unless you require multiple QC jacks). A 20 Ah powerbank possesses 74 Wh of capacity (calculated by multiplying 20Ah by 3.7V), which typically costs between $20-$30. In contrast, the battery shown has a capacity of 54 Wh (determined by calculating 3Ah multiplied by 18V) and retails for $30-$40. This discrepancy arises from the fact that tool batteries like these are designed to deliver an immense amount of power within a short timeframe. According to Einhell's support, their battery can supply up to 70A.