This is fine for testing the DC port, but this would be unusable for playing because it is so loose it needs to be held into just the right place to work. Tested on 5 GBC's and was the same issue on all 5.

Cable stops charging with the slightest movement.

Works as advertised

the connection is faulty. A bump easily resets the system. looking at the connector itself, it looks slightly crooked, which could explain the spottiness. Likely happened during transit, but still disappointing. I probably won't be able to use this product because of it, really cool idea though. :T

I Love How It Works Great

The cable is overall fine and does what it is supposed to do. Build quality is decent, but the power pin connection to the Gameboy Color isn't all that great. It's about 10mm too long, and results in a good portion of the connector sticking out as bare metal exposed . This results in the connection being somewhat loose and also that it is easy to damage if you are not careful and were to drop/knock off the cable while still being connected. A shorter power pin would've been a snugger fit and would be less prone to breakage should the connector be accidently yanked. Also, it introduces the possibilities of an inadvertent short if a wire or other exposed conductive metal were to come in contact with the exposed pin. I wouldn't really recommend this product, and I'd look for a cable that had a better/snugger fit power pin. I've attached a picture of it plugged into a GBC. I have multiple GBCs and I've tested this out and they all exhibit the same behavior. Due to the looseness of the connection it also results in power loss if you wiggle the cable too much (which you should definitely not do in general as GBC/Pockets are 20+ year vintage devices). Also note, the Pocket shares the same power plug as the GBC, so I would expect the same result on a Pocket.