These USB-C style products can be complicated. I am looking for the best quality charger and cable. However most of the time one cannot use a 85 watt or 65 watt USB-C charger with this Coleco compatible product since some multi voltage chargers put out 0 voltage unless the connected device handshakes with the charger to tell the charger what voltage to use. In addition, this Coleco USB power converter is not designed to handshake with a smart USB C power adapter. Another issue is the select few 85 watt and 65 watt USB-C chargers that do default to 5 volts DC at 3 amps instead of 0 voltage without a handshake, are really outputting a maximum of 15 watts when 5 volts is being used. Which means a dedicated 17 watt 5 volt 3.4 amp USB-C charger is a better solution for the ColecoVision when compared to a 65 watt and 85 watt charger that actually only puts out 15 watts at 3 amps maximum if one can get it to work with the ColecoVision.
When it comes to 17 watt 3.4 amp USB-C power adapters, I was not able to find one in a single port design. They all have a combo port design. The 17 watt 3.4 amp Cable Matters model ASSA83ac-050340 has an input voltage of 100-240 volts with 50/60Hz at 0.5amps. The output voltage is 5 volts DC at 3.4 amps for both the USB-C port and the USB-A port according to the specs. However, that is a shared 3.4 amp rating, so as soon as one plugs in two devices the maximum output well be 3.4 amps that is shared between the two ports (plug in only one device and that device has full access to the chargers 3.4 amps). This 17 watt 3.4 amp Cable Matters USB-C power supply has an energy efficiency level VI from the Department of Energy (which is required by law on all external power adapters manufactured or imported into the United States since Feb 2016). In addition, this Cables Matters 17 watt adapter is UL listed and since it does not have a built in USB-C power cord it allows one to plug in just about any length of cable like 3.3 feet, 6 feet, 10 feet, etc. The 17 watt 3.4 amp Cable Matters model ASSA83ac-050340 in theory should be the best solution for the ColecoVision and it costs around $11.00 delivered (I have not tested it yet on the ColecoVision to see how well it works).
Then one well need a USB-C male to USB-C male power cord to go with the above adapter. Since the above 17 watt adapter can put out a maximum of 3.4 amps, I went with a Gold plated 6 feet USB-C cable that is rated at 5 amps and 100 watts of power with a nice thick cable for around $9 delivered. (I have not tested it yet on the ColecoVision to see how well it works).
Therefore, I am paying around $40 for the 4 pin ColecoVision USB power converter, then around another $20 for a high quality USB-C power adapter with gold plated USB-C power cord. I just realized my final cost for this 17 watt ColecoVision project is around $60. If one wanted to sale this item on Amazon or EBAY they would need to mark it up around 20% to break even ($72). So selling it online at around $79.99 would be around a $5 to $8 profit. One can purchase a 550 watt ATX power supply with the original 4 pin ColecoVision power cord for $89.99 (or around $55 if one installs the Coleco wire harness on the ATX power supply themselves instead of buying it online). The only real advantage of this Coleco USB power converter is the small size of the adapter, but the time involved in researching and choosing compatible USB-C chargers and cables is disappointing. It might be a few weeks before I get everything and verify that everything is working. I am not a fan of USB charging and power technology because of all the different incompatibility issues.
Edited by HDTV1080P, Fri Jan 11, 2019 12:17 AM.