Great charger
"Automated. Place batteries inside and off you go. So nice to be able to do 4 batteries at 5he same time. Highly recommend."







The Nitecore UMS4 Charger is a four-slot smart charger with intuitive features and intelligent charging programs. The QC input of the UMS4 allows for a maximum output of 4,000mA which will quickly recharge your batteries with efficiency and with minimal discharge. If you're only using a single slot, thats no problem, the single slot maximum output of Nitecore UMS4 Charger is 3,000mA which will charge 80 percent of a 3,500mAh battery in 55 minutes, giving you plenty of time to charge up for your next use. Other smart features of this device is the Internal Resistance and Battery Health Detection which will alert you to the state of your battery. The UMS4 also provides real-time charging information, such as battery voltage, charging current and duration, so you can monitor the status of your battery.
The Nitecore UMS4 Charger is designed to prevent overheating of both your batteries and the charger itself. With a built-in fin design at the edges of the charger, the UMS4 is able to bring a cooling performance that will disperse heat rapidly. Plus, the UMS4 has intelligent temperature regulation that prevents the charger from overheating and will ensure a stable charging process. These features, combined with the durable and fire retardant materials that make up the UMS4, will protect you and your batteries from danger. Not to mention that the energy saving function, which is when the charger dims after 3 minutes of inactivity, will ensure that the UMS4 is always ready to use and won't waste any charge of its own.
Features:| Brand | Nitecore |
| SKU | NITECORE-UMS4 |
| Series | UM |
| Manufacturer Part Number | UMS4 |
| UPC | 6952506492824 |
| Charger Channels | 4 |
| Compatible Battery Sizes | 10440, 14500, 14650, 16340 / RCR123A, 16500, 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700, AA, AAA, AAAA, C, D |
| Supported Chemistries | IMR, Li-Ion, LiFePO4, Ni-Cd, Ni-MH |
| Charge Rate | 4000 |
| Charger Channels | 4 |
| Compatible Battery Sizes | 10440, 14500, 14650, 16340 / RCR123A, 16500, 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700, AA, AAA, AAAA, C, D |
| Length | 6.26 in (159 mm) |
| Width | 4.21 in (107 mm) |
| Height | 1.61 in (41 mm) |
| Weight | 9.01 oz (255 g) |
| Certifications/Standards | CE, CEC, FCC, RoHS |
| Country Of Origin | China |
| HTS Code | 85044030 |
| Length | 6.46 in |
| Width | 5.17 in |
| Height | 1.16 in |
| Shipping Weight | 0.84 lb |
| Packaging | Boxed |
| Warranty | Battery Junction Warranty |
| Return Policy | Return Policy |
Overall rating: 4.3333335 / 5 from 9 reviews.
Review topics: [].
"Automated. Place batteries inside and off you go. So nice to be able to do 4 batteries at 5he same time. Highly recommend."
"I purchased the UMS4 as an upgrade/supplement to the D4 that I purchased from Batteryjunction in 2015, mainly so that I can more quickly and easily charge my 21700 batteries. I've found the unit easy to use, based on my longstanding experience with the D4, and the extra features it offers is awesome."
"I use a USM4 version [2000mA] almost daily for NI-MH AA and AAA, mostly for lights. Batteries pop into slots #1-3 easily but not slot #4 - tricky to make the connection by cocking battery at a slight angle. Resistance value doesn't make sense to me as it may or may not change [usually decreases but sometimes not] during or after charging. I now step down the power on AA & AAA as the [intelligent] setting can 'cook' some batteries and get them too hot to hold in your hand. Any battery discharged below . 9V triggers an error message and charging will not proceed [I use my older [dumb] D2 to kick it up past . 9V]. Other than those annoying glitches, this is a workhorse as I sometimes need all four slots at once."
"Really like the display readout"
"Information on screen can be hard to understand on some functions but that could just be me nobody ever accuse me of being a brain"
"Perfect fit for 21700s 18650s, etc."
"great 4 bay charger to accomodate newer (bigger) sized batteries. 26650 and 21700 easily fit, as well as the 'older-sized' batteries like CR123. Smart enough to charge Ni-MH 1. 2v rechargeables too."
"has trouble connecting with buttonless 18650 cells in bay 2 and 4"
"Bought this for my 21700 battery charging needs. Not very many of the popular chargers will fit the length of this length battery. Works very well! Many features that I will not use. I just needed the basics. Powered by a mini USB/plug/charger and has no power cord/supply of its own. Can use with a mobile charger. Nice!"
Your cart is currently empty.
Start Shopping