I do not have any to test myself. But HKJ has. He also mentioned there may be a problem with smaller button tops. https://budgetlightforum.com/t/-/8112 I just like the versatility of the sysmax being able to charge multiple chemistry's and even 26650's when get around to buying some.
My 4Sevens fits the new Trustfire 5000 button tops and King Kong flat tops, and the 4Seven semi-flat tops all perfectly and no magnets required. It charges the KK and 4Seven batteries to 4.2v, but only seems to charge the Trustfire's to 4.18v.
Sure Fishin, here you go. It also comes with a 12v adapter to plug it into a cigarette lighter to charge the batteries. It's good for me because I also have a small 50 watt solar array with ample 12v power for emergency useage. There may also be prices slightly lower if you shop around, but I used my CPF coupon code for a slightly less price.
Xtar SP2, I am looking at buying one myself since I now have multiple 26650 lights and the WPII 2 only fits 1 26650 at a time, otherwise I may make a couple of "sidecars" to use with my WPII 2 so I can charge 2 26650s at the same time.
I have the Xtar SP2 charger and It is my new favorite charger with it’s ability to charge at .5a, 1a, and 2a which is selectable with the push of a button rather than using some cheap slider switch. I did some testing of my own and it seems to follow a pretty good CC/CV algorithm. It accepts anything from a 50mm length on up without spacers and can even handle 32650s. I tested current output and it does what it says it does. 2a pretty much stays dead on 2a during the CC stage, for example. More importantly, it does not overcharge even IMR batteries like some other chargers. It always terminates properly. It fits 2 x 26650s with ease and 2 x Feilong 32650s with a little loading care.
Also, the quality is very obviously way better than the Ultrafire chargers.