The 3d printed adapter being sold on ebay is what i use now
but after having owned 7 if these little beasts I have never had any connector issues and my windcamp battery works great after 6 years on my current ND model I have had the day it came out
my first one i bought the day it came (non-ND) out did blow the finals?
John ve3ips
FT8 is not Ham Radio Try QRP cw or SSB instead
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John