Agreed except for the 6.0Ah HO XC allegedly uses 18650, not 21700. See here. Otherwise the 6.0Ah HO XC would be as wide as a 12.0Ah, which it does not appear to be. edit: actually at second glance, it does appear the 6.0Ah HO XC is wider than the 6.0Ah XC, so my link is wrong and they probably...