The Nitecore UM2 is an intelligent, USB-powered dual-slot battery charger known for its fast charging capabilities and broad battery compatibility. It provides real-time charging information on an energy-efficient LCD screen and has multiple safety features.
Key specifications
Input: DC 5V/2A or 9V/2A. The maximum input power is 18W.
Output: The voltage output varies depending on the battery type: 4.35V±1%, 4.2V±1%, 3.7V±1%, or 1.48V±1%.
Charging speeds:
QC Mode: Up to 1,500mA per slot, with a maximum of two slots charging simultaneously. To use this mode, a Quick Charge 2.0 adapter must be used.
Standard Mode: Up to 1,000mA per slot.
Dimensions: 152mm x 73mm x 40mm (5.98″ x 2.87″ x 1.57″).
Weight: 148.3g (5.23oz) without the charging cable.
Compatibility: The UM2 is compatible with a vast range of rechargeable batteries, including:
Li-ion / IMR / LiFePO4: 10440, 14500, 14650, 16340, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, and 26650.
Ni-MH / Ni-Cd: AA, AAA, AAAA, C, and D.
The Nitecore CI4 charger’s safety features include reverse polarity protection, short-circuit protection, overcharge and overtime charging protection, over-discharged battery activation, intelligent temperature monitoring, and automatic charging termination to prevent damage and hazards. It also uses a durable, fire-retardant casing and a cooling fins design for optimal heat dissipation.
Protective Features
Reverse Polarity Protection:
The charger prevents damage if a battery is inserted with the positive and negative terminals reversed.
Short-Circuit Protection:
It protects the charger and batteries from damage caused by short circuits.
Overcharge Protection:
The CI4 automatically stops charging once a battery is full, preventing overcharging.
Overtime Charging Protection:
The charger will terminate the charging process after a set period to avoid potential issues.
Over-Discharged Battery Activation:
It can activate Li-ion batteries that have been discharged to a very low voltage.
Intelligent Temperature Monitoring:
The device includes features to monitor and control temperature, dissipating heat to prevent overheating.
Construction and Design
Fire Retardant Materials:
The charger is built with durable, fire-retardant materials for increased safety.
Cooling Fins Design:
A unique design with cooling fins allows for efficient heat dissipation to prevent overheating during charging.
Battery Inspection:
The CI4 can detect inserted batteries that are short-circuited or have reversed polarity, alerting the user with flashing indicator lights.
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