I'd like to check li-ion 18650 and 14500.
Yeah, I know there's no 3800mah but if I get something close to 3500 it's ok.
I'm considering the Liitokala Lii500-S charger...
Looks like a decent charger according to reviews. I have a (slightly modded) Opus BTC-100 single cell charger that works fine and for me it is a good all around charger due to it has the option to be powered via micro USB 5VDC input or 12VDC input and also work as a power bank if using lithium ions (which I think the Lii500s can also do).
For now I rarely need to charge more than 1 battery a day and a many 18650 devices have built in charging.
I think in the future I will consider a 4 cell charger as I've gravitated to 18650 format as my primary battery type and have worked on replacing my commonly used lights with 18650 variants over the last few years.
My advice is when you get a new charger don't just slap a battery in it and abandon it and come back half a day later, keep an eye on it till you get through a few charge cycles so you know that the charger isn't defective. I almost never leave a lithium ion charger on if I am going to be gone from the house for over half an hour just a safety precaution.