Don't waste your money. The build quality of the side ports is terrible. The pins for the pens do not match the holes in the case so they don't make contact with the side of the stylus, just stop the stylus from entering. I bought two and both had the same problem. I thought I was just unlucky with the first one and was willing to buy another one as it's cheap and WireCutter recommended, but now I'm 0 out of 2. UNPLUGGED) You could try pointing the pin in the direction to slide where he should be. This, combined with slightly spreading the pins of a cheap AC to USB converter I had lying around, allowed me to connect. This seemed to squeeze the contacts into a better position, leaving me unable to connect other devices with little persuasion. This amount of mechanical fiddling really shouldn't be necessary, but FWIW both devices worked fine electrically (I've had one for a few months and used the USB ports every day).
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