The new Nitecore SC2 is a universal, automatic smart-charger compatible with almost all types of rechargeable batteries thus eliminating the need to own several chargers. The SC2 is capable of up to 3A charging in one slot for quick top ups. With a max total charge rate of 5A the SC2 can charge one slot at 3A and another at 2A simultaneously.
Features
Specifications:
Input voltage: AC 100~240V 50/60HZ 0.9A (MAX) or DC 12V 2.5A
Output voltage: 4.35V+-1% / 4.2V +-1% / 3.7V +-1% / 1.48V +-1%
USB: 5V 2.1A
Output current: 3A+2A MAX
Dimensions: 6.10" x 3.16" x 1.73" (155mm x 80mm x 44mm)
Weight: 9.28oz / 263g (without batteries and power cord)
Compatible with:
Li-ion / IMR / LiFePO4
10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650
Ni-MH / NiCd
AA, AAA, AAAA, C, D

The charger has two power connectors, one for mains input (100-240VAC 50/60Hz) and one for 12 VDC input.
There is also a usb output connector, this is not a power bank, but mains powered usb output.

The cardboard box lists lot of specifications, battery types and features.

The slots uses the usual construction and works well. They can handle batteries from 27mm to 70mm long.
This excludes some of the longest batteries, especially some protected 26650. Notice the long bar at the plus end, due to this the charger can handle anything up to D or 32xxx size.
The SC2 is a solid example of why hunters use them. Each slot charges on its own, it picks the current by battery length, shows progress on the display, and stops when the cell is full. Temperature monitoring and reverse polarity protection look after your 18650s overnight.
It's the habit of keeping lithium-ion cells between about 20% and 80% charge to slow wear, which helps for storage between seasons. Before a cold night hunt you'll want a full charge, and the SC2 charges to full and then stops on its own.