I used the UMS4 for a while now. I charge mostly AA and AAA . I experienced some very dangerous overheating situations. Just recently a SONY AA CycleEnergy was heated up very much . The other cells were loaded correctly. It was obvious that the cell could not be loaded, but it tried to push energy in. I would recommend not to charge without observing the state of loading process.
Its unfortunate that you still require a QC charger for this. Would be nice if it had its own power module and you can plug it straight to an outlet, and charge batteries up to 3A individually
Great presentation as always. I have had a UMS4 for a few years now and I didn't know about the quick charge. I thought that because it only used the micro usb that it couldn't do the higher amperage. Thanks for pointing that out!
Thanks for the review, ive has a nitecore i2 charger for about 10 years and its getting long in the tooth. Checking reviews, and it seems nitecore has still got it!
I have 2 Nitecore ums2. Both are one year old, one failed today so it's in the bin. These chargers will only charge 1x battery at 3A, it's a shame it won't charge 2 batteries at 3A. They do NOT charge at 3A when it first turns on, just 1.5A, you have to change it manually with the settings.
Brilliant video. Super helpful. I'm going to order the UMS2 when I order the Nitecore P23i flashlight, and a spare battery for it, once the P23i arrives back in stock here in the UK.
@@blade6843 Its a great torch and a great charger. Could not be happier with them. Going to be getting some more use come next month and onwards over the winter. Had some real enjoyment with the P23i and the TM28 last winter.
i have purchase this ums2 charger, i'm trying recovery my imr 18650 dead battery, its work but they are detected as nimh battery and the voltage is 1,4 only, after few sec i remove them from charger because is become hot. are my battery is dead and cant to recovery again?
You don't specify if the batteries are getting hot or the charger is getting hot. If it's the batteries, stop charging immediately! They are probably severely damaged from being over discharged. Never discharge a li-ion battery below 2.5v. Everytime you do it, it causes more damage internally. It's ok for them to get warm while charging, but if they get hot, the battery is damaged internally or you are putting too much current into it. Only high drain batteries can handle 3A of current, and even that is going to shorten the batteries life span if done repeatedly. It's best to always check the manufacturers data sheet for recommended charging rate. They will list a "standard" rate and a "rapid or fast" charging rate, but the fast rate will always decrease the number of cycles that the battery will last, usually by a huge amount. It's ok to do it once in a while, but do it repeatedly and you will be replacing your cells much sooner.
@@craigs7181 the batteries is getting hot. i stop charging immediately, i dont follow nitecore lights sugestion to leaving them overnight. its not worth it with the risk. thx for your information!
Hi.. I am curious. How did the battery capacity showed (as u said) on 04:58 dropped from 1060mAh to 997mAh on 05:13. Then, on 05:28 it dropped to 964mAh while the monitor showed 20mAh has gone in. 😅
Hi, thanks for sharing. Should it work using a solar charger directly connected? I asume not at 3A but could it work even at lower speeds? Thanks in advance
Is the UMS4 capable of discharging batteries? Also, is it capable of being used as a power supply to charge, a smart phone, for example? If not, those might be good ideas for future upgrades.
@@NitecoreSG Does the USM2 LCD screen DIM after 10 minutes & is the dimmed screen REALLY DARK or just a bit dimmer compared to the normal LCD brightness ?
I really enjoy your videos . I am in the market for an head Torch for arms length work . And I was thinking of the NU_35 . But your comment about the AAA batterys put me off a bit ? . What type of AAA batterys does it use ? .
Same with my issue What adapter r u using? Im using samsung adaptive charger Using another charger will solve the issue, but i cant find any adapter that can awake its QC feature Even my anker powerport cant turn the UMS4 on !!!
Hello, good review, please can you tell me if the screens of the ums2 and ums4 have the same resolution or that of the ums2 is of better visual quality. Tks
For some reason mine doesn’t charge unless I load in one battery, wait a few seconds, and put in the other one. If I try to put both in at the same time then the mA never goes up for either of the batteries.
Hello, I want to ask.. how come my UMS2 cannot charge with 2A each despite it says "Quick Charge" on the display? Is my head charger faulty or the UMS2 is faulty?
I just charged a flat top 18,650 battery until it said FULL. I removed it and after a few minutes I put it back into the charger. It no longer said FULL, but started to charge again with the last bar blinking. It was fully inserted both times. Why did this happen? Edited to add that I’m using the UMS4.
If my Eneloop Pro batteries are blinking red (means rechargeable batteries are no longer working), will UMS4 be able to receover them? Also, does Nitecore have suitable AA and AAA batteries for photography equipment such as flash guns?
Thanks for an informative video, I would like to purchase a ums4 , 21700 batteries and a single 21700 with the magnetic lite kit , I cannot find any dealer who sells these anywhere in Australia , so it’s making me wonder if I should look for another brand that is easier to find , I have asked you in another video about how much it would cost me to purchase from you , I haven’t had a reply , just one telling me if I spend $300 I will get free shipping to Australia , can I also ask where you are , thank you , look forward to hearing from you .
There should be a dealer there, if not yes, we do ship worldwide via DHL, and yes you get free shipping over $300. If not, just need to pay the DHL rate and we’re set.
I have a pair of fujitsu battery..one of them showed poor when charging using UMS4..can UMS4 eventually repair the battery ? Or I should use another setting for this ? Or the battery can't be used anymore or it can harm the UMS4 ? Thank you..
No, it cannot be repaired. Just charge them at a low current so they don't get hot. It can still be used, they just shouldn't be used in high drain devices. Make sure to test it several times because the readings can vary considerably each time simply because of poor contact with the chargers terminals.
Hello mister.. I have your charger (UMS2) and two Intelligent 5000mah batteries. Can I leave them charging overnight? Will it explode in my bed room? Thank you in advance!
Hello, I have a doubt that I would like to clarify. I generally use my UM2 to charge Ni-MH battery types, recently I purchased a few USB rechargeable 650mAh 14500s and I observed that the batteries charge in almost 2hrs 40mins using a 5V 1A power supply with USB cable and nearly 2hrs with the UM2 charger but after the charge reaches 650mAh the charger doesn't stop unless it reaches 4.2V. So is it ok to charge the 14500s till they reach 650mAh because I thought charging the USB rechargeable batteries with an Intelligent charger would likely extend the life of the battery compared to a constant power supply when every possible and while traveling I use the USB cable way. So which is the preferred method to charge USB rechargeable batteries to extend the life.
The UMS series of chargers have an option to detect the battery’s ‘Internal Resistance’ and determine it’s condition as ‘Good / Poor’. (If the count is below 250, then ‘Good’ and above 250 then ‘Poor’.) So wanted to understand what is the ideal numeric value for Internal Resistance when the Lithium Ion battery is just out of the box(or may be after its first full charge)? Would it be zero or a positive number less than 250?
When it say poor in the display or (er) if i remember right what do that mean? i had some batteries that had that and they where old and 1 cheap ebay battery?
@@iandguzman I ended up using my UMS4 with a good quality micro USB to type C adapter. It might not be the most elegant solution, but it works well and i don't need to have a dedicated micro USB cable laying around.
I bought a Nitecore umsc4 while I'm in the truck it charges All my batteries quickly, but when I try to charge them in the house they take all day to charge
My ums4's slot 3 keeps on displaying eeee despite the fact that it has no battery on it. The monitor also keeps showing a charging option. How to solve this? I registered mine at your website and it turned to be genuine though.
quick question in regards to the Chinese branding on the box. Are they still genuine Nitecore? I purchased an mh12s from ebay and the box is in Chinese
Chinese wordings on the boxes means they’re illegal exports from China. These items are not supposed to be sold outside of China and will not be covered under any warranty anywhere. Buy at your own risk.
I wanna buy nitecore ums4, where should i go??? Please tell me the username of shopee or tokopedia which is buy nitecore ums4. Sorry if my english is bad, im Indonesian. Please reply me
I use liitokala li-600.. 3a per slot charge mode, auto or manual charging/discharging current setting, discharge mode, charge-discharge-charge mode for capacity test, repair mode, battery internal resistance check.. love it!
Why do these 'smart' chargers still use the legacy micro-USB port on the device side? USB-C has been around for almost 10 years, and there's no excuse to use anything but USB-C now.
I used the UMS4 for a while now. I charge mostly AA and AAA . I experienced some very dangerous overheating situations. Just recently a SONY AA CycleEnergy was heated up very much . The other cells were loaded correctly. It was obvious that the cell could not be loaded, but it tried to push energy in. I would recommend not to charge without observing the state of loading process.
Its unfortunate that you still require a QC charger for this. Would be nice if it had its own power module and you can plug it straight to an outlet, and charge batteries up to 3A individually
I like when a company explains in detail how there products work and does mind telling you about there other lesser tiers
I've had the nitecore i2 charger for about 10 years. Great charger!
Great presentation as always. I have had a UMS4 for a few years now and I didn't know about the quick charge. I thought that because it only used the micro usb that it couldn't do the higher amperage. Thanks for pointing that out!
Glad to have helped!
wondering which one shoud i go for between XTAR VC4S & Nitecore UMS4
Thrunite chargers is also very good and shows all the data of individual cells all the time.
Thanks for the review, ive has a nitecore i2 charger for about 10 years and its getting long in the tooth. Checking reviews, and it seems nitecore has still got it!
Hello.
What is the difference between ums4 and um4?
I don't understand. ums4 faster?
Nice review.
Btw. I have one question.
In input 18W (MAX). What if i use 20W? Is the quick charge in Nitecore UMS2 will turn on?
I have 2 Nitecore ums2. Both are one year old, one failed today so it's in the bin.
These chargers will only charge 1x battery at 3A, it's a shame it won't charge 2 batteries at 3A.
They do NOT charge at 3A when it first turns on, just 1.5A, you have to change it manually with the settings.
Great video not sure if you mentioned it can this charger discharge my good battery I like to put a few cycles on it and see the average of milliamps
Brilliant video. Super helpful. I'm going to order the UMS2 when I order the Nitecore P23i flashlight, and a spare battery for it, once the P23i arrives back in stock here in the UK.
Got the exact same set up buddy and in the UK too! 👍
@@blade6843 Its a great torch and a great charger. Could not be happier with them. Going to be getting some more use come next month and onwards over the winter. Had some real enjoyment with the P23i and the TM28 last winter.
I just got this charger today and threw away 2 full sets of 20700 batteries a few days ago. Wish I would have watched this before hand😂
i have purchase this ums2 charger, i'm trying recovery my imr 18650 dead battery, its work but they are detected as nimh battery and the voltage is 1,4 only, after few sec i remove them from charger because is become hot. are my battery is dead and cant to recovery again?
Try leaving them overnight. If that doesn’t work then it’s probably dead
You don't specify if the batteries are getting hot or the charger is getting hot. If it's the batteries, stop charging immediately! They are probably severely damaged from being over discharged. Never discharge a li-ion battery below 2.5v. Everytime you do it, it causes more damage internally. It's ok for them to get warm while charging, but if they get hot, the battery is damaged internally or you are putting too much current into it. Only high drain batteries can handle 3A of current, and even that is going to shorten the batteries life span if done repeatedly. It's best to always check the manufacturers data sheet for recommended charging rate. They will list a "standard" rate and a "rapid or fast" charging rate, but the fast rate will always decrease the number of cycles that the battery will last, usually by a huge amount. It's ok to do it once in a while, but do it repeatedly and you will be replacing your cells much sooner.
@@craigs7181 the batteries is getting hot. i stop charging immediately, i dont follow nitecore lights sugestion to leaving them overnight. its not worth it with the risk. thx for your information!
Hi.. I am curious. How did the battery capacity showed (as u said) on 04:58 dropped from 1060mAh to 997mAh on 05:13. Then, on 05:28 it dropped to 964mAh while the monitor showed 20mAh has gone in. 😅
Informative video. 💡 I hope Nightcore makes a USB C version of this. 🔌
I am preety sure the new ones shown here are usb
@@andrewsteinberg7728 Nope, they're micro USB
+1 , usb-c pls.
I will not buy anything that has a micro usb.....prehistoric.....
Hi, thanks for sharing. Should it work using a solar charger directly connected? I asume not at 3A but could it work even at lower speeds?
Thanks in advance
Is the UMS4 capable of discharging batteries? Also, is it capable of being used as a power supply to charge, a smart phone, for example? If not, those might be good ideas for future upgrades.
you will be lucky if it wont broke in 1 week as mine. the smaller formats AA, AAA dont sit well in slots. find another producer.
If discharging for taking care of your batteries is what you look for, then look for the BC-700
Micro USB... Seriously? for QC?
handphone charger is USB output. Cable is a different thing. You can even put a lightning cable to it. So I don't see the issue.
I wanted one but micro USB in 2023 doesn't make sense
Yep, they lost a sale to me because of this. I will go with one from Xtar.
What is the advantage of the UMS4 over the UM4? What type of user is the UM4 geared towards?
UMS is double the charging speed of UM. If budget is not a concern then just go for UMS, there’s not much point in going for the UM series.
@@NitecoreSG Does the USM2 LCD screen DIM after 10 minutes & is the dimmed screen REALLY DARK or just a bit dimmer compared to the normal LCD brightness ?
Does Anker make the right charger to get that higher amp output? If not that's quick irritating especially that it's not mentioned on the box.
Is the UMS4 the most recent charger ? Can they "repair" batteries ?
Received my USM2 few days ago, works great.
Hi bro! Can you tell me what camera and lens do you use for this video? thanks a lot for the answer.
Does Nitecore have one with USB-C like this one? The Nitecore Ci4 looks kind of weak and doesn't have a display with information, just lights.
Mine doesn't read the internal resistance worth a darn... can't depend on it at all.
Now I'm not sure if the other readings are accurate or not.
I really enjoy your videos . I am in the market for an head Torch for arms length work . And I was thinking of the NU_35 . But your comment about the AAA batterys put me off a bit ? . What type of AAA batterys does it use ? .
can that charger mesure capacity? i got some cells from a battery pach no info in cells need to know capacity. to use same or higher capacity.
Great explanations ! thank you very much ! what you teach in your videos is very appreciated and Helpful
I got a UM4..what's the difference from a UMS4?.. Should I upgrade?
Can't find these in your website. Even if I follow the link here it says page cannot be found?
mine did not display ma & mah. the display is always 0 ma/mah & Good. what's wrong?
What battery are you charging?
Same with my issue
What adapter r u using? Im using samsung adaptive charger
Using another charger will solve the issue, but i cant find any adapter that can awake its QC feature
Even my anker powerport cant turn the UMS4 on !!!
Hello, good review, please can you tell me if the screens of the ums2 and ums4 have the same resolution or that of the ums2 is of better visual quality. Tks
For some reason mine doesn’t charge unless I load in one battery, wait a few seconds, and put in the other one. If I try to put both in at the same time then the mA never goes up for either of the batteries.
I thought the UI1 is capable of reviving “dead” batteries as well? Its even listed on their website or am missing something?
Does the um4 can repair the discharge batery?
Hello, I want to ask.. how come my UMS2 cannot charge with 2A each despite it says "Quick Charge" on the display? Is my head charger faulty or the UMS2 is faulty?
I just charged a flat top 18,650 battery until it said FULL. I removed it and after a few minutes I put it back into the charger. It no longer said FULL, but started to charge again with the last bar blinking. It was fully inserted both times. Why did this happen? Edited to add that I’m using the UMS4.
does a 3A makes the battery shorten its life?
Does the USM2 LCD screen DIM after 10 minutes & is the dimmed screen REALLY DARK or just a bit dimmer compared to the normal LCD brightness ?
Hithere!!! i want to ask whats the diferent between UM4 and UMS4?
Nice review. Btw, these UMS2 or 4, can you leave the battery to charge overnight ? thanks !
Yes, no problem
Please tell me what is the difference about umS and um?? Please tell me i need infomation
If my Eneloop Pro batteries are blinking red (means rechargeable batteries are no longer working), will UMS4 be able to receover them? Also, does Nitecore have suitable AA and AAA batteries for photography equipment such as flash guns?
Guess you just have to try it yourself to find out
I want to ask, What is mean -dV/dt in display?
Why not USB-C conector?!? Is more user friendly, supports high current in QC 3.0, mechanically more ridgid...
Still hoping for a charger with discharge function from Nitecore. And please with USB-C or another connector, Micro-USB seems to be a bit fragile.
So which one is better D4 or UMS4? Both have the same price.
Where do I get a micro b cable capable of 3 amps?
Just ordered the Nitecore ums2 charger 💪
Thanks for an informative video, I would like to purchase a ums4 , 21700 batteries and a single 21700 with the magnetic lite kit , I cannot find any dealer who sells these anywhere in Australia , so it’s making me wonder if I should look for another brand that is easier to find , I have asked you in another video about how much it would cost me to purchase from you , I haven’t had a reply , just one telling me if I spend $300 I will get free shipping to Australia , can I also ask where you are , thank you , look forward to hearing from you .
There should be a dealer there, if not yes, we do ship worldwide via DHL, and yes you get free shipping over $300. If not, just need to pay the DHL rate and we’re set.
I have a pair of fujitsu battery..one of them showed poor when charging using UMS4..can UMS4 eventually repair the battery ? Or I should use another setting for this ? Or the battery can't be used anymore or it can harm the UMS4 ? Thank you..
No, it cannot be repaired. Just charge them at a low current so they don't get hot. It can still be used, they just shouldn't be used in high drain devices. Make sure to test it several times because the readings can vary considerably each time simply because of poor contact with the chargers terminals.
I have the UM2 unit, can I choose the CV or CC charge mode? Or it automatically?
It be nice if you put the names of all authorized dealers on the your videos.
Hello mister.. I have your charger (UMS2) and two Intelligent 5000mah batteries. Can I leave them charging overnight? Will it explode in my bed room? Thank you in advance!
They, won’t, it’s quite safe. The material is also fire retardant.
Hello,
I have a doubt that I would like to clarify.
I generally use my UM2 to charge Ni-MH battery types, recently I purchased a few USB rechargeable 650mAh 14500s and I observed that the batteries charge in almost 2hrs 40mins using a 5V 1A power supply with USB cable and nearly 2hrs with the UM2 charger but after the charge reaches 650mAh the charger doesn't stop unless it reaches 4.2V. So is it ok to charge the 14500s till they reach 650mAh because I thought charging the USB rechargeable batteries with an Intelligent charger would likely extend the life of the battery compared to a constant power supply when every possible and while traveling I use the USB cable way. So which is the preferred method to charge USB rechargeable batteries to extend the life.
The UMS series of chargers have an option to detect the battery’s ‘Internal Resistance’ and determine it’s condition as ‘Good / Poor’. (If the count is below 250, then ‘Good’ and above 250 then ‘Poor’.) So wanted to understand what is the ideal numeric value for Internal Resistance when the Lithium Ion battery is just out of the box(or may be after its first full charge)? Would it be zero or a positive number less than 250?
My new samsung 30T 21700 is reading 25mR out the box. And the older one 40T that i charge for 4 times now is reading 27mR.
When it say poor in the display or (er) if i remember right what do that mean? i had some batteries that had that and they where old and 1 cheap ebay battery?
Poor just means the battery is close to its max recharge cycle; the capacity won’t be as high as if it was brand new.
between D4 vs UMS4 which one better?
Definitely the UMS 4
Can this charger use to charge 1.5v rechargeable Lithium ion battery?
1,5v Lion...arent all Lithnium Ion batteries 3,6v nominal...
@@-joo3033 there is a special step down to 1.5v
When comes USB-C version, please?
The charger with CI series has it, did you get it...?
@@J4M3S_. Thank you. Yes, I have bought one.
@@hansginzel5973
And how does it work...??
@@J4M3S_. Works good, I am satisfied. Simply interface.
@@hansginzel5973
Great...! Good to know because I just ordered one.
Hello!
Will it charge 3.2V LiFePO4 cells?
How much for 4 slots nitecore?
Does Nitecore sell AAA type batteries?, why are sizes not mentioned explicitely?
I just got mine today. How do i display battery capacity? It shows 0000mA.
How do i know if its full, mine still blinking 2 bars after 1 hour and 20 minutes
Thanks, nice review.
To super fast charge on ums4 only one slot and which one ?
Would you recommend using a micro USB to Type C adapter with this charger?
it uses micro usb which is a bummer. why i went with another brand instead of it
@@iandguzman I ended up using my UMS4 with a good quality micro USB to type C adapter. It might not be the most elegant solution, but it works well and i don't need to have a dedicated micro USB cable laying around.
Can It charge 21700 protected cells
Yes it can charge it. Nitecore Lights responded to my (same) question.
I bought a Nitecore umsc4 while I'm in the truck it charges All my batteries quickly, but when I try to charge them in the house they take all day to charge
Your truck probably has QC port, while the one you’re using at home does not. Make sure they both have qc3.0 and you’re set
Compared to SC4, which one is better? In terms of functionality.
Ums4 for sure. SC4 can’t charge 21700 batteries
Can these discharge batteries and storage mode functions?
Which one is better UMS4 or i4?
My ums4's slot 3 keeps on displaying eeee despite the fact that it has no battery on it. The monitor also keeps showing a charging option. How to solve this? I registered mine at your website and it turned to be genuine though.
Bring it back to your retailer
Will ums4 same as ums2 and charge 1 battery in one slot at 3 amps?
Hey there, can the nitecore ums4 charge 18650 15A continuous high drain protected buttontop batteries?
All button top batteries. Even the big 21700 ones!
Have the ums2 does all of them. The 4 also. One of the reasons I got it.
2023, any quick charger over 4A
What is the difference between D2 and UMS2?
Hi is Amazon authorized dealer ?
Can I charge regular batteries with this as well (those not explicitly designated "rechargeabale"?
NO ! Otherwise the battery would be explicitly labeled "rechargeable"
Don’t ever risk trying it. Total fire hazard.
In nitecore charger which charger is fastest.
Which is a better charger? um4 vs ums4?
UMS4 for sure.
quick question in regards to the Chinese branding on the box. Are they still genuine Nitecore? I purchased an mh12s from ebay and the box is in Chinese
Chinese wordings on the boxes means they’re illegal exports from China. These items are not supposed to be sold outside of China and will not be covered under any warranty anywhere. Buy at your own risk.
@@NitecoreSG thank you very much, I did buy one from ebay which sucks. As I don't know where to buy Nitecore products from Australia
@@NitecoreSG thank you very much, they assured me it is fully covered by Nitecore🤦🏻♂️ is the Chinese product genuine nitecore? sorry to be a pain
@@Studat they can say what they want now. Until you try to return the light to them for warranty then see what happens 😄
@@NitecoreSG Lucky me😩😩😩
Is it capable of discharging? (memory erase)
Can’t do that
@@NitecoreSG Hopefully the next version supports some kind of smart and/or manual discharge feature for Ni-MH and Ni-Cd batteries.
If I put in a 18650 battery 🔋but the UMS4 charger can't detect any battery means my battery is dead
Is it a Micro usb Are usb C?
Thanks. It seems quite decent.
in phillipines sir were ur store..
can i use a 18w 3amp usb type c charger for the 5000mAh USB-C rechargeable battery NL2150R?
Can’t, there’s no fast charging for it. It will work but not as fast.
@@NitecoreSG can you recommend me a usb charger. What’s the max amps it can take?
Are you saying the USB-C batteries, such as the NL2150HPR, can't be quick charged?
Nice review
I wanna buy nitecore ums4, where should i go??? Please tell me the username of shopee or tokopedia which is buy nitecore ums4. Sorry if my english is bad, im Indonesian. Please reply me
shopee
Either Shopee or Tokopedia is alright. Di tokped ada toko yg namanya "datangjualbeli" yg ngejual charger ini
What about 21700 protected cells?
It works for those as well
@@NitecoreSG That was a quick respond... thanks :D
One big flaw: no discharge and “training” modes
different price range
So can you recommend better product than this?
I use liitokala li-600.. 3a per slot charge mode, auto or manual charging/discharging current setting, discharge mode, charge-discharge-charge mode for capacity test, repair mode, battery internal resistance check.. love it!
Why do these 'smart' chargers still use the legacy micro-USB port on the device side? USB-C has been around for almost 10 years, and there's no excuse to use anything but USB-C now.
Can the UMS4 charge the 20350 battery?
It will probably select too high of a charging current for smaller batteries. I personally wouldn't go over 1A max. 500mA to 700mA would be better.
Prever better ums4 or sc4?
UMS4. It can charge 21700 batteries.
Yes thank you
Than you. 👍🏼
Great review,great man !