I picked up 10 individual x2 18650 or x4 18350&16340 pack on eBay for $3 shipped. there pretty nice and came in green and pink. took about 2 weeks to get delivered but the upside now all my batteries are safely in cases.
the range from 3.78v through 4.01v. they were all on the charger all at once for 2 hours before I checked on them and noticed they were super hot to the touch.
I have a D2 and a D4 Nitecore chargers.
I just pulled 6 Sanyo cells from a laptop battery and stuck em all on the chargers.
Every battery but two that are slowly charging are EXTREMELY hot!
What is going on here? there slowly making there charge but unsafe due to them being un-holdable.