i7 5820K @ 4.25GHz | RTX 3080 Ti FTW3 | Gigabyte GA-X99-UD4 | Corsair DDR4 3000 32GB | Corsair HX 750W
SSDs: Intel 660p M.2 2TB, 3x Samsung Evo 1TB | Startech PCIe 4x USB 3.0 | Startech PCIe 2x USB C 3.1 gen2
@BLACKHOLENIXON, that battery charger appears to be the 'charge in pairs' variety, i.e. it has 2 charging circuits not 4 so you have to charge either 2 or 4 batteries.
In my opinion it's preferable to get a charger that has 4 circuits so that single batteries can be charged. Otherwise you'll be pairing up a discharged battery with a partially discharged battery when charging, which could affect overall battery life.
There are some good cheep chargers out there like the Panasonic/eneloop BQ-CC55.
Intel 5820K OC@4Ghz, Titan X (Maxwell), 32GB Corsair Vengeance DDR4, ASRock X99 Taichi, Samsung 500Gb 960 Evo M.2, Corsair H100i v2 Cooler, Inateck KTU3FR-4P USB 3 card, Windows 10 Pro v21H2 (19044.1706)