I have the same issue with the VC4SL
26800 is a problematic size, if you have a flashlight for it with charge connection I would recommend to use it. I know only the XTAR SC1 PLUS Charger for 26800, and a 1-Slot-charger with null features isn´t my favorite
For cells up to 21700 I would recommend the Vapcell S4 Plus, it´s an very reliable charger also for NiMH.
The Nitecore UM (S)4 is a bit cheaper but it have some issues so I don´t like it that much, but´s it´s still much better than the VC4SL