Nitecore UM2 battery charger Household battery DC Lithium-Ion Nickel-Cadmium

The Nitecore UM2 battery charger Household battery DC Lithium-Ion Nickel-Cadmium is a compact two-slot charger designed for home use. It supports charging of common cylindrical battery sizes including AA, AAA, AAAA, C and D and accepts a 9V DC input with an internal output of 4.35V suitable for compatible rechargeable chemistries. The unit's black housing provides a discreet, space-saving solution for charging two batteries simultaneously while maintaining compatibility with both Lithium‑Ion and Nickel‑Cadmium cells.

Advantages

The charger offers dual‑slot charging so two batteries can be charged at once, saving time. Its compatibility with multiple battery sizes and chemistries reduces the need for several dedicated chargers and supports a range of household devices. The 9V DC input and built-in output control ensure safe charging for batteries that require a 4.35V charge profile. The compact black design is practical for storage and everyday use.

Suitable for

• Recharging AA and AAA rechargeable batteries used in remotes, toys and small electronics
• Charging AAAA cells commonly used in styluses and small devices
• Charging C and D rechargeable cells for flashlights and portable radios
• Household users who need a single charger compatible with multiple battery chemistries

Key specifications

• Slots: 2 battery channels for simultaneous charging
• Compatible chemistries: Lithium‑Ion and Nickel‑Cadmium rechargeable cells
• Compatible sizes: AA, AAA, AAAA, C, D
• Input: 9V DC power source
• Output characteristic: 4.35V charging profile for compatible cells
• Color: Black

How to use

Insert batteries into the slots observing the correct polarity markings. Connect a compatible 9V DC power adapter to the charger's input socket and plug the adapter into the power source. The charger will provide the appropriate charging voltage for supported Lithium‑Ion and Nickel‑Cadmium batteries. Monitor the batteries during charging and remove them when charging is complete or when the charger indicates a full charge. Do not attempt to charge non‑rechargeable batteries.

Recommendations

Use a proper 9V DC adapter rated for the charger and place the unit on a stable, heat‑resistant surface while charging. Avoid exposing the charger to moisture or extreme temperatures. For longest battery life follow manufacturer guidance for each battery type and avoid leaving batteries in the charger for extended periods after reaching full charge.