Nitecore UMS2 USB Charger

£29.95

In Stock
Product thumb
Nitecore UMS2 USB Charger
£29.95
  • Input: DC 5V/2A 9V/2A 18W (Max)
  • Output: 4.35±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
  • QC Mode: 3000mA x 1 (Max) / 2000mA x 2 (Max)
  • Standard: 2000mA x 1 (Max) / 1000mA x 2 (Max)
  • QC 2.0 input available
  • Capable of charging 2 batteries simultaneously and controlling each slot independently
  • Energy efficient LCD display
  • Automatic termination upon charging completion
  • Reverse polarity protection and short circuit protection
  • Over-discharged battery activation
  • Made from durable and fire retardant PC materials
  • Optimal heat dissipation design
  • Certified by RoHS, CE, FCC and CEC
Product thumb
Nitecore UMS2 USB Charger
£29.95

1 Review

5.0 Overall rating

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08/02/2023

I purchased this charger mainly to charge up a couple of Nitecore's 21700 NL2150HPi batteries I own. After emailing Nitecore on which of their chargers would charge up their 21700 NL2150HPi batteries, I decided on this model as I mainly was just going to be using it with the two NL2150HPi batteries. This charger will also charge up a very extensive range (too many to list) but amongst others 18650, 21700, AA, AAA, AAAA, C, D sized batteries. The display is excellent and is very clear to see and read, and it will dim in brightness after a few minutes of no buttons been pressed. The screen shows lots of information about the battery; charging status, charging progress, battery resistance. Like the SC4 charger I own, these have to be the most detailed and information rich chargers I have ever used! I really like the ability to alter the charging current and for times where I am charging my batteries overnight, I will put them on charge when I go to bed and choose a 1000 mA charging current, rather than the default, the charger picks for the battery. I do this for two reasons; one is I will be asleep for around 8 hours, so I do not need them to charge fast, and two is; it is said that charging on a lower charging current, will not shorten the cells life as much as charging on a higher charging current. It is also possible to charge some of the Li-on cells up with a maximum of 3000 mA charging current (providing you use a suitable power source, such as the Qualcomm QC 3.0 USB Adapter that Nitecore sell) so this would be ideal if you were in a hurry for your batteries. The display is split up into different sections: Slot 1, Slot 2. This tells you the channel you are seeing the information for. Charging mode. This tells you battery type (Li-on, Ni-MH, Ni-CD, Li-FE), voltage type of the selected battery. Charging channels. This tells you the selected battery channel and a series of five segments for each channel, which flash as the channel is getting charged, and progressing from one segment on a low battery to a steady five segment when the battery in that channel is fully charged. Channel status. This shows lots of useful information about the battery. From the current charging mA, the amount of mAh the battery has had put into it and also in this instance the charging time (when a channel is fully charged, the channel stops charging and all of the segments in the battery channel will remain steady to indicate fully charged). And also you can see the total time the battery has been on charge so far, that is until it is fully charged and then this time on charge feature is no longer shown. I would have liked to have seen the remaining time, remain on once the battery is completely charged (like it does with the SC4 charger) and that is the only niggle I have with this charger. You can also select the charging current for the selected channel, and also you are able to individually select the charging current for the other channel too. I find this charging current option is really handy for when I am charging my Li-on batteries overnight, and don't require the fastest charging. Also in the charging status, is shown the battery's internal resistance, which from what I can gather, when the internal resistance is below 250mΩ, the lcd screen will indicate good when it is above 250mΩ, the lcd screen will show poor to indicate Battery Status. Below the screen are two buttons, one on the left is the C button, and the one on the right is a V button. Pressing the C button allows you to select the channel you want to see information on. Holding the C button down will then put you into the manual settings, and this then allows you to choose the charging current in the channel status (as mentioned above) the charging current will begin to flash, and you can then press the V button and you will see the charging current go up, once its at the desired level, press and hold the C button and this will sa

Description

The Nitecore UMS2 is a dual slot USB battery charger with a total maximum output of 4000mA and an impressive single slot maximum of 3000mA. Please note, in order to achieve the maximum charging speed a 9V 2A QC 2.0 charging adapter must be used. The charger is compatible with a range of input sources, such as solar panels, USB adapters and power banks. 

Click here to view Qualcomm Quick Charge Adapter

The charger is optimised for IMR batteries and monitors the entire charging process, ensuring the cut-off voltage is always within safe limits. When the battery is inserted, the charger will automatically detect the cell and select betwen the 3 charging modes (CC, CV and -dV/dt).

The UMS2 features an LCD display for real time charging information, including internal resistance and battery health detection. A short press on the 'V' switch will cycle through the charging information, including the charged volume, charging time, charging current, battery voltage, battery type, cut-off voltage and charging mode. If desired, the charging parameters can be set manually. Long press the 'C' button to enter the charging setting mode.

The Nitecore charger features over-discharged IMR battery restoration, over-discharged Li-ion battery activation, anti-short circuiting and reverse polarity protection to keep your batteries in the best health for as long as possible. 

The Nitecore UMS2 is compatible with the following IMR/Li-ion/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 and the following NiMH/NiCd batteries: AA, AAA, AAAA, C and D.

The Nitecore UMS2 user manual can be downloaded here.