I’m doing a poll to see what kind of connectors people are using most of the time for the e-board batteries. Shameless plug: I’m doing this in order to know what kind of connectors I should offer with my next product, an inexpensive high-power switch. But in addition to that, this would be useful information to others as well!
You might include 5.5mm bullet which is very commonly used.
I don’t think anyone uses 3.5mm bullets.
Some people are using XT90 connectors. You might include them as well.
Just an idea, you could just have options on your site (store) and have the top 3 connectors on their (xt90,xt60,5.5bullet etc), might take a little extra effort but is good service imo.