USB (Quickcharge 3.0) Adapter for Einhell Power X Change Battery
prusaprinters
<p>I made this adapter to get 4 Quickcharge ports out of my Einhell battery. With this the battery is transformed to a very powerful powerbank. You could quickly charge 4 smartphones or use 4 TS80 (successor of the TS100, not tested).<br>Edit 2019-07-19: Tested it with the TS80, works like a charm at 12V with Ralims Firmware. :)</p><p>BOM:</p><ul><li>4 (or 2) QC3.0 USB DC-DC Buck Converter <a href="https://www.aliexpress.com/item/QC3-0-QC2-0-USB-DC-DC-Buck-Converter-Charging-Step-Down-Module-6-32V-9V/32887717476.html">https://www.aliexpress.com/item/QC3-0-QC2-0-USB-DC-DC-Buck-Converter-Charging-Step-Down-Module-6-32V-9V/32887717476.html</a></li><li>Crimp male spade connectors <a href="https://www.aliexpress.com/item/100pcs-50pairs-6-3mm-16-14AWG-Female-Male-Electrical-Wiring-Connector-Insulated-Crimp-Terminal-Spade-Blue/32846771914.html">https://www.aliexpress.com/item/100pcs-50pairs-6-3mm-16-14AWG-Female-Male-Electrical-Wiring-Connector-Insulated-Crimp-Terminal-Spade-Blue/32846771914.html</a></li><li>4 M3 screws, 6-12 mm length</li></ul><p>some hot glue I printed it without support, but if your printer is not well tuned for bridging you might need support.</p><p>The top holds the USB modules in place without any screws. For the assembly i glued them down to get the top easily on.<br>You'll need to snip off the plastic things on the USB jack (see photo).</p><p>I've also attached a version with only 2 ports and the Fusion 360 project file.</p><p>PS: If i am not mistaken, it makes no sense to extra buy a Einhell battery just for this (maybe except if you need a lot QC jacks). A 20 Ah powerbank has 74 Wh (20Ah<i> 3.7V) and costs 20-30€, the battery in the picture has 54 Wh (3Ah</i> 18V) and costs 30-40€. I think this comes from the fact, that these tool batterys are made to deliver a huge amount of power in a short period of time. According to the support of Einhell, the battery can deliver 70A.</p><p>(Imported from https://www.thingiverse.com/thing:3062487)</p>
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