Nitecore i4 Amazon UK/USA - https://amzn.to/3wJ2WYX
D4 - https://amzn.to/3aKzUK5
My hands on review of the latest 4 bay multi format battery charger from Nitecore. The new i4 offers some additional features compared to the previous model including faster charging speeds (for one cell) and adjustable voltages for type of lithium batteries.

This extended look at the charger includes voltage testing on charged cells.

Details from the maker:

The NITECORE Intellicharger I4 NEW Version Charger is a universal, automatic smart-charger compatible with almost all types of rechargeable batteries thus eliminating the need to own several chargers. The i4 is able to automatically identify Li-ion, Ni-MH and Ni-Cd rechargeable batteries and apply an appropriate charging mode (Constant Charge Current (CC), Constant Charge Voltage (CV) and Trickle Charge). Each of the i4's four microcomputer-controlled charging slots is capable of monitoring and charging batteries independently. Additionally, yellow and blue power / charging status indicator lights could visibly indicate battery status and charging process. i4: The all-new highly advanced smart charger. It's as simple as insert, detect, and charge.

The I4 charger has a microprocessor, which controls each channel
separately allows for charging different batteries at the same time. With this charger recharge all batteries ! It is worth to buy a battery charger and replace a simple charger or several chargers for one !


Features

Twice the charging speed of the i4/ i4 eu charger
Active Current Distribution (ACD) Technology
Compatible with 1.2V, 3.7V, 4.2V, 4.35V batteries
Charging program optimized for IMR batteries
Automatic detection of non-rechargeable batteries
Capable of charging four batteries
Four charging slots charge and control independently
Automatically detects battery power status and displays charging progress
Automatically stops charging upon charging completion
Reverse polarity protection and short circuit prevention
Over-discharged battery activation
Overtime charging protection
Designed for optimal heat dissipation
Made from fire resistant, flame retardant PC material
Certified by ROHS, CE, FCC and CEC

Specifications

Input Voltage: AC 100-240V 50/60Hz 0.25mA (max) 10W DC 9-12V 1A
Output Voltage: 4.35V±1%/4.2V±1%/ 3.7V±1%/ 1.48V±1%
Output Current: 1.5A x1 / 0.75A x 2 /0.5A x 2 / 0.375A x 4
Compatible with:
Li-ion/IMR/LifePO4
10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 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

Dimensions: 140mm x 94.8mm x 37mm
Weight: 202g (without batteries and power cord)