okay anymore suggestion before i make a final purchase :O
You really can't got wrong with any of the main brands suggested for vaping batteries, Nitecore is on the lower scale, but it is a trickle charge only method with these, chargers slower and is gentle on batteries. Efest LUC (LUC Models only) have multimode charging, 2, 4, and now a 6bay available, middle of the road. Xtar by far for the price range is the best out there, and they come with a rock solid warranty, ranging from single bays up to 6 and 8 bays if you really search, on the pricey end compared to Nitecore and Efest LUCs, but there are more expensive brands out there RC enthusiasts and such use like Pila mentioned above. Best suggestion, look in the 35 to 45USD price range for an excellent 4bay will save you a lot of headache down the road.
Nitecore - i2 and i4 are older but still solid chargers, the D2 and D4 are upgrades with digital displays, if you can afford it go with the D4 - I own an i4 that is still running strong that pulls backup duty mostly now since I got my Efest LUC4 and Xtar VP4
Efest LUC - LUC2, LUC4, or the newer LUC6 - Own an LUC4 and happy with it for travelling purposes
Xtar - take your pick of any except the WP211 (Largest battery the 211 can handle is an 18500), can't really go wrong with any of their models - I own a VP4 that is my main home charger and it handles batteries very very well able to rescue very low charged batteries.