The Nitecore Ci2 Dual Slot Universal Battery Charger offers the convenience of charging two batteries simultaneously while providing independent control for each slot. With its USB-C charging port, it is compatible with QC/PD input and automatically detects it. Additionally, the charger boasts an impressive maximum output of 3,000 mAh in a single slot, ensuring fast recharging.

This intelligent battery charger is equipped with automatic detection of the battery's power level, allowing it to select the appropriate voltage and charging mode for efficient recharging. It also detects the battery's capacity and adjusts the charging current accordingly. Once the battery is fully recharged, the charger automatically stops charging to prolong the battery's lifespan.

To ensure safety, the Ci2 charger incorporates various protections, including reverse polarity and short circuit protection, over-discharged battery protection, and overtime charging protection.

Here are the specifications of the Nitecore Ci2 Dual Slot Universal Battery Charger:
- Input: 5V - 2A; 9V - 2A, 12V - 1.5A, 18W (MAX)
- Output: 4.2V +/-1% | 1.48V +/-1%
- Fast Charge Mode: 3,000mA*1 MAX; 1,500mA*2 MAX (Note: Achieves 3,000mA single-slot max output when powered by QC/PD supportive device or connected to a QC/PD adapter)
- Standard Mode: 2,000mA*1 MAX; 1,000mA*2 MAX

The Nitecore Ci2 charger is compatible with a wide range of batteries, including 3.6V/3.7V IMR/Li-ion batteries such as 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 21700, 22500, 22650, 25500, 26500, 26650, and 26700. It also supports 1.2V Ni-MH/Ni-Cd batteries like AA, AAA, AAAA, C, and D.