Works great
Nitecore UMS4 – Advanced 4-Bay Charger for High-Performance Batteries
Elevate your charging experience with the Nitecore UMS4, an advanced 4-bay charger designed for a wide array of battery types, including 20700 and 21700. This powerful charger features a bright digital LCD display providing real-time charging information and multiple charging speeds, ensuring your batteries are charged efficiently and safely. With capabilities to handle up to 3,000mA in a single slot and integrated Quick Charge (QC) technology, the UMS4 is perfect for tech enthusiasts and professionals who need their batteries ready to go at all times.
Key Features:
- Versatile Charging Options: Offers a range of charging speeds with a maximum of 3A in single slot QC mode, accommodating various power needs and schedules.
- Advanced Compatibility: Comfortably fits larger battery sizes like 20700 and 21700, in addition to a wide range of Li-ion and Ni-MH/Ni-Cd batteries, with automatic detection and adjustment features.
- Intelligent Display: Features an energy-efficient LCD that shows vital charging stats and updates in real time, enhancing user control and monitoring.
- Enhanced Safety Protocols: Built-in safety measures prevent short circuits, overcharging, and improper battery insertion, ensuring the utmost safety during use.
- Optimized Design: Made from durable, fire-retardant PC materials with an optimal heat dissipation design, certified by RoHS, CE, FCC, and CEC.
Compatible With:
- Lithium Ion IMR or LiFePO4 Batteries: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
- Ni-MH / Ni-Cd Batteries: AA, AAA, AAAA, C, D
The Nitecore UMS4 is your go-to charging solution, combining versatility, safety, and intelligent features for the ultimate battery management experience.
Technical Info:
- Input: DC 5V/2A 9V/2A 18W (MAX)
- Output: 4.35V±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
- Output current: QC Mode: 3,000mA*1 (MAX) 2,000mA*2 (MAX) 1,000mA*4 (MAX)
- Standard Mode: 2,000mA*1 (MAX) 1,000mA*2 (MAX) 500mA*4 (MAX)
- Dimensions: 6.26" x 4.21" x 1.61"
- SIZE/TYPE COMPATIBILITY - ✔ 18650 ✔ 20700 ✔ 21700
- Nitecore UMS4 battery charger
- Micro USB cord
- User Manual
- Scratch-off validation serial number
⚠ Important Safety Warnings
Improper use of a battery charger can result in overcharging, short circuits, or damage to the battery, causing FIRE, EXPLOSION, or ELECTRICAL SHOCK. Users must follow all safety guidelines to ensure proper operation. Click here to review the full safety guidelines.
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Device Compatibility:
- Use the charger only for compatible battery types and sizes as specified by the charger manufacturer. Ensure the charger is appropriate for the battery chemistry, size, and protection status (e.g., unprotected or protected cells).
- Do not charge non-rechargeable batteries (e.g., alkaline or primary cells).
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Proper Use:
- Only charge batteries in a fireproof or non-flammable area. Avoid charging on beds, couches, or other flammable surfaces.
- Do not force a battery into the charger slot if it does not fit properly. This can damage the charger or battery and may result in unsafe charging conditions.
- Inspect batteries before charging: Do not charge if the battery casing, wrapper, or terminals are damaged, dented, leaking, or bulging.
- Never leave batteries unattended while charging. Monitor the charging process, and unplug the charger when charging is complete.
- Avoid exposing the charger to liquids, high heat, or direct sunlight.
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Inspection:
- Do not use the charger if the power cord, plug, or device is damaged.
- Inspect both the charger and the battery for any signs of damage before use.
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Storage & Handling:
- Keep the charger away from children and pets.
- When not in use, unplug the charger and store it in a cool, dry place.
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Prohibited Activities:
- Do not modify or disassemble the charger.
- Do not attempt to repair a damaged charger—replace it with a new one.
- Avoid using extension cords or adapters that exceed the manufacturer’s recommendations.
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Emergency Response:
- If the charger or battery emits smoke, sparks, or a burning smell, disconnect the power immediately and move the battery and charger to a safe area.
- In case of fire, use a Class D fire extinguisher or sand to extinguish the flames.
Disclaimer
IMR Batteries is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Battery chargers must only be used with compatible battery types and operated in accordance with manufacturer instructions. It is the reseller's responsibility to ensure all safety warnings and product guidelines are effectively communicated to their customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.
Customer Reviews
Overall rating: 4.8 / 5 from 40 reviews.
Love it
Yeah, it shipped slower than usual but this is a fantastic charger! I'd gotten use to the older Nitecore taking longer to charge. This new one is SUPER FAST!
Arrived in good shape and works well! Only complaint would be on this version the light stays on constantly (even when not in use). All in all a good product though
Very fast shipping I would buy from this place again with no problem thanks for everything you guys
Works just as it should, I’m very pleased.
The best charger I ever bought, really accurate, provide me with all I need, battary detection is fantastic
Charge the batteries fast and so far so good
Does what it says as others say what they are yet fail at being just that
batteries a little difficult to grasp when taking out
Two negatives: 1) you must punch a button the see the voltage of each battery.....2) It would be nice if the readout for each battery was directly above the associated battery. It's not. It is shifted to the right a bit. Not a big deal. I do plan to buy a 2nd one because I do like the charger, especially its ability to charge protected 21700 batteries.
As long as you have a QC3-capable cable and plug this charger delivers the rated power and even a bit more.
Micro USB power connector doesn't seem to be able to push enough power to charge 2 much less 4 batteries! It takes forever to charge my high capacity batteries even though the USB-A is connected to a high powered 3.0 USB port! My D4 charges way faster, so can't really recommend this charger. Maybe Nitecore needs to change the power cord to either direct power plug or use the USB-C 3.0 power cord!!
I charge both 18650 lion and AA nimh batteries every day. I needed a charger that will accept 21700 batteries and chose this one due to my previous experience with the Nitecore SC4 which is also an excellent charger. The UMS4 does not disappoint. The build quality is very good. It does what it is supposed to do and does it very well. I highly recommend the UMS4, however, you will need a high quality QC 3.0 power supply for it to function properly. I also recommend IMR batteries for your purchase. They always have great prices along with fast shipping.
Great battery charger. Charges my batteries quick while giving you a great amount of info while charging.
:+1::skin-tone-3:
Works perfect
gave 4 stars because of the stupid usb power source. all batts fit
Charges all of my batteries and works great. Only has a USB plug for power and would have liked a wall plug too but easy work around.
Great charger
Happy! Gets the job done! See my other review..
The charger is very good ! The Molicell batteries were not very good. I have have Well Used 10 year old LG batteries that flat out out perform the Molicell P28A !
BEST CHARGER I EVER BOUGHT EASY TO GET INFO , GET BATTERIES OUT AND IN AND SIMPLE EFFECTIVE TECH! FAST SHIPPING TOO.
works great
IMR is my only trusted source for batteries. Been buying my batteries and chargers from them for many years.
ok
Great charger. Exactly as described.
Nitecore is the best!
Charges my 18650 & 21700 cells at the same time with no issues.
It’s a battery charger
Loved it!
This Nitecore replaces an older one which lasted over 12 years charging 4 batteries at a time on the average of twice a week. So for the price I can't complain.
Product was very good. Good place to buy batteries and chargers from highly recommended
Not as fast as some chargers I've used but all of the additional features make up for it
Excellent! Works really well
Great battery charger
Great battery charger
Arrived in good shape and works well! Only complaint would be on this version the light stays on constantly (even when not in use). All in all a good product though
Works just as it should, I’m very pleased.
Works just as it should, I�m very pleased.