UM20 is the latest innovation from Nitecore that is a USB powered Li-ion battery charger. It is compact, fully automated with clear digital display of detail charging status and charges many different type Lithium Ion rechargeable batteries.
Charger Safety Warning:
Nitecore recommends using only quality USB adapters with the UM20. Using poor quality adaptors may result in the LCD displaying “EE” to indicate an error.
The charger is restricted to charging Li-ion, IMR rechargeable batteries only. Never use the charger with other types of batteries as this could result in battery explosion, cracking or leaking, causing property damage and/or personal injury.
The safe operation temperature for the charger is between -10 to 40°C, and the safe storage temperature is -20 to 60°C.
Do not use the charger to charge other unspecified batteries as they may leak or burst, causing personal injury and damage.
Observe polarity diagrams located on the charger. Always place the battery cells with positive tip facing the top.
Never leave the charger unattended when it is connected to power. If any malfunction is found, terminate the process at once and refer to the operation manual.
The charger is for use of adults above 18 years old. Children under this age must be supervised by an adult when using the charger.
Please make sure the correct program and settings are chosen and set. Incorrect program or setting may damage the charger or cause fire or explosion.
Never attempt to charge primary cells such as Alkaline, Zinc-Carbon, Lithium, CR123A, CR2, or any other unsupported chemistry due to risk of explosion and fire.
Do not charge a damaged IMR battery as doing so may lead to charger short-circuit or even explosion.
Never charge or discharge any battery having evidence of leakage, expansion/swelling, damaged outer wrapper or case, color-change or distortion.
Do not expose the device to direct sunlight, heating devices, open flames; avoid extreme high or extreme low ambient temperatures and sudden temperature changes.
Please operate the charger in a well-ventilated area. Do not operate or store it in damp area. Keep all the inflammable volatile substances away from operating area.
Avoid mechanical vibration or shock as these may cause damage to the device.
Do not short-circuit slots or other parts of the device. Do not allow metal wires or other conductive material into the charger.
Do not touch hot surfaces. The rechargeable batteries or the device may become hot at full load or high power charging/discharging.
Do not overcharge or over discharge batteries. Recharge drained batteries as soon as possible.
Remove all batteries and unplug the charging unit from the power source when not in use.
Opening, disassembling, modifying, tampering with the unit may invalidate its guarantee, check warranty terms.
Do not misuse in any way. Use for intended purpose and function only.
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