The Nitecore UM4 is a multi-slot battery charger designed for users who need efficient and reliable charging for a range of rechargeable batteries. With four independent charging bays, 1500mA charging, and Quick Charge 2.0 compatibility, the UM4 is suited to home, travel and professional use.
Four Independent Charging Slots
The UM4 features four charging bays that operate independently, allowing different battery types and sizes to be charged at the same time.
Broad Battery Compatibility
Compatible with:
- Li-ion batteries
- IMR batteries
- Ni-MH batteries
- Ni-Cd batteries
Suitable for commonly used cells including:
- 18650
- 21700
- AA batteries
The charger automatically detects installed batteries and selects an appropriate charging mode and voltage.
Real-Time LCD Display
The built-in LCD screen provides live charging information, including:
- Charging progress
- Battery voltage
- Charging current
- Internal resistance
- Battery condition information
Intelligent Battery Functions
The UM4 includes automatic battery level detection and activation for over-discharged IMR and Li-ion batteries where supported.
Safety Protection Features
Designed with multiple safety systems, including:
- Reverse polarity protection
- Short circuit prevention
- Overcharge protection
The body is made from fire-retardant PC materials and includes a heat dissipation design for stable operation.
Compact and Practical Design
Its compact size makes the charger suitable for desk use, storage or travel when battery charging is required away from home.
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