Averyminya
Grasshopper Backer
Nitecore Intellicharger I4 (=>2014) or D4. Always insert a minimum of two batteries to take it easier on and enhance the life of smaller capacity batteries. (can be different sizes).
If you only want to do two at a time the I2 or D2 would also work ok.
For sure thank you very much! I went to a friends house recently who has lots of 18650 batteries, but I know the Grasshopper batteries are a little different. Same with the Air, apparently, but for a different reason. But yeah, I mostly wasn't sure if it was okay to charge an 18650 and the Grasshopper battery at the same time on an external charger.
I have 2 GH batteries, I think I'm going to order 2-3 more and an extra Air battery. Is there any difference between an I4 and a D4? I would probably get the D4 on Amazon for $20.
Thanks again