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Nitecore UM4 USB Quadro 4 Slot Battery Charger for AA, AAA, AAAA, Li-Ion, 18650, 26500, etc, £13.99 @ 7dayshop
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Nitecore UM4 USB Quadro 4 Slot Battery Charger for AA, AAA, AAAA, Li-Ion, 18650, 26500, etc, £13.99 @ 7dayshop

£13.99£157%7dayShop Deals
85
Posted 8th JunEdited by:"louiselouise"
Also on their ebay store for the same price ebay.co.uk/itm…504
£27.95 on the manfacturer's site nitecore.co.uk/Sho…tml
£24 from Gearbest gearbest.com/cha…tml
£23.97 at Banggood banggood.com/NIT…tml

Edit: (Thanks to Sye_Clarke for pointing this out): Please be aware there are counterfeit Nitecores out there, mentioned here
3243935.jpg3243935.jpg3243935.jpg3243935.jpg3243935.jpg3243935.jpg
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3243935.jpg3243935.jpg3243935.jpgScreen grabs from the Youtube video below - at the bottom of this post:3243935.jpgComparisons of the UMS4 vs this UM4 (also from the aforementioned Youtube video):3243935.jpg3243935.jpg3243935.jpgThe Nitecore UM4 charger is a fast and efficient USB charger that can charge up to four batteries with the option to control each bay independently. The charger has a maximum output of 1500mA in a single slot - please note, this is only achievable if using a 9V 2A QC 2.0 charging adapter.

The charger features a charging programme specially optimised for IMR batteries which monitors the entire charging process, ensuring that the cut-off voltage is always within safe limits to extend the lifespan of the battery.

The Nitecore UM4 has a useful LCD display which relays real-time charging information. A short press on the 'V' button will cycle through details on the charged volume and charging time, charging current and battery voltage, battery type, cut-off voltage and charging mode. The charger will automatically select from 3 charging modes when the battery is inserted, according to the battery type and capacity. Alternatively, the charging parameters can be set manually to meet various charging needs;long press the 'C' button to enter the charging setting mode.

The charger offers over-discharged IMR battery restoration. When an over-discharged IMR battery is inserted, the screen will show 'EE EE'; simply long press the 'V' button to enter restoration mode. The screen will also display 'EE EE' if a short-circuited battery is inserted or the cell is the wrong way round.

The Nitecore UM4 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, 26650, 26700 and the following NiMH/NiCd: AA, AAA, AAAA, C, D.

  • Input: DC 5V/2A 9V/2A 18W (MAX)
  • Output: 4.35V±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
  • QC Mode: 1,500mA x 1 (MAX), 1,500 x 2 (MAX), 750mA x 4 (MAX)
  • Standard Mode: 1,500mA x 1 (MAX), 1,000mA x 2 (MAX), 500mA x 4 (MAX)
  • Compatible with: IMR/Li-ion/LiFePO4: 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: AA, AAA, AAAA, C, D
  • Dimensions: 6.26" x 4.21" x 1.61" (159 mm x 107 mm x 41 mm)
  • Weight: 8.21oz (232.8 g)
  • Intelligent USB Four-Slot Charger
  • QC 2.0 input available
  • Capable of charging 4 batteries simultaneously and controlling each slot independently
  • Up to 1,500mA charging speed in a single slot
  • Compatible with Li-ion and Ni-MH/Ni-Cd batteries with automatic detection
  • Automatic detection of battery power level and automatic selection of the appropriate voltage and charging mode
  • Automatic selection between 3 charging modes (CC, CV, and -dV/dt)
  • Energy-efficient LCD display for real-time charging information
  • Capable of manually selecting the charging cut-off voltage and the charging current
  • Automatic termination of large/small capacity batteries and automatic selection of appropriate charging current
  • Automatic termination upon charging completion
  • Reverse polarity protection and short circuit protection
  • Over-discharged battery activation
  • Li-ion battery restoration
  • Overtime charging protection
  • Automatic detection of battery internal resistance and display of battery health
  • Made from durable and fire-retardant PC materials
  • Optimal heat dissipation design
  • Certified by RoHS, CE, FCC, and CEC

Youtube review from Mr Baz Reviews:
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Top comments
neik09/06/2019 09:21

I have never found a charger other than Panasonic ones that will charge a …I have never found a charger other than Panasonic ones that will charge a NiMh battery that is completely flat. Any recommendations?


I just use another battery to kick start it, like this:
You guys have confused the hell out of me , I have an i4 however need another one now and literally didn’t know there was this many variations! I’m assuming us4 is better than i4 which is better than d4?
85 Comments
hot
Also, same price on ebay from 7dayshop store... here
Hot
Very good price for a good brand. Looks like it's QC 2.0 compatible, I reckon it would take a very long time to charge not using quick charge. My old nitecore d4 took all night to charge 4x 18650s, at 250mah iirc.
dorito08/06/2019 23:01

Also, same price on ebay from 7dayshop store... here



I've quoted the ebay store link at the very top of the post
louiselouise08/06/2019 23:04

I've quoted the ebay store link at the very top of the post


Ignore me. I'm such a numpty.. Sorry.
Will it come with the quick charge adaptor
dorito08/06/2019 23:06

Ignore me. I'm such a numpty.. Sorry.



It's alright, I have blonde moments every day!
Be careful, those pictures show 2 different chargers. The UM4 and the UMS4. The UMS4 charges at a maximum of 3000mA for a single slot cell, whereas the UM4 only 1500 mA. Also the UMS4 is around £30, twice the price.
Edited by: "gazjon" 8th Jun
ryancurly08/06/2019 23:07

Will it come with the quick charge adaptor



You have to supply your own USB AC Adapter.
gazjon08/06/2019 23:19

Be careful, those pictures show 2 different chargers. The UM4 and the …Be careful, those pictures show 2 different chargers. The UM4 and the UMS4. The UMS4 charges at a maximum of 3000mA for a sigle slot cell, whereas the UM4 only 1500 mA. Also the UMS4 is around £30, twice teh price.



Only one of the pictures shows the UMS4 (though it was a screengrab from the Youtube reviewer - I added it because it had some bullet points I thought may be useful). He's actually using it as a comparison illustration - UM4 vs UMS4. At 6:33 he discusses the differences between the two models.

Didn't notice that actually, but all the other photos are of the UM4.

(This one)
37818997-X92Re.jpgFor clarity, I'll add the UM4 illustration he shows after the one above, to the Deal post. This one:37818997-4smLK.jpg
Edited by: "louiselouise" 8th Jun
You have to remember to provide this charger with good power source, especially if you want to charge battery with 1500mAh. Connecting this charger to PC USB(mostly 5V 500mAh) port wouldn't work well with fast charging options.
mgb2008/06/2019 23:31

Similar model from the same manufacturer but I think I prefer this one at …Similar model from the same manufacturer but I think I prefer this one at the same price.Nitecore i4 Intelligent Multi Battery Charger



Think that's a previous year's model, but they seem quite similar (apart from the electronic display) - and the i4 is 50p cheaper at £13.49. Some reviews/Q&As on Amazon here if anyone wants a look.
mgb2008/06/2019 23:31

Similar model from the same manufacturer but I think I prefer this one at …Similar model from the same manufacturer but I think I prefer this one at the same price.Nitecore i4 Intelligent Multi Battery Charger



Mains powered as opposed to USB.
gazjon08/06/2019 23:39

Mains powered as opposed to USB.



The Amazon illustration isn't really helping as you can't see the adapter very well, but seems so.37819102-hQWPi.jpgWeirdly 7dayshop don't have any cables or adaptors in their images for the Nitecore i4 at all, but they do have "Supplied with a 3 Pin UK plug/power lead." in the blurb.

I have all sorts of (fast charging/variable output) USB adapters now so I'd probably go for the UM4.
Edited by: "louiselouise" 8th Jun
dirty_stan08/06/2019 23:04

Very good price for a good brand. Looks like it's QC 2.0 compatible, I …Very good price for a good brand. Looks like it's QC 2.0 compatible, I reckon it would take a very long time to charge not using quick charge. My old nitecore d4 took all night to charge 4x 18650s, at 250mah iirc.


For a similar price or less you can find the Lii500 which has a reasonably accurate capacity checking mode.
Edited by: "LadyEleanor" 8th Jun
How does this fare with Eneloops? Is it any better or worse than a 'standard' Sanyo/Pana charger as supplied with Eneloops?
This or the Nitecore Digi-charger D4 for about £3 more?
Edited by: "mikeypr" 8th Jun
The Nitecore D4 from 7dayshop is here at £16.99 - seems to come with a UK plug as well

Their blurb says:
  • Supplied brand new in retail pack: AA, AAA, NiMH to Li-Ion rechargeable batteries. Nitecore D4 is an intelligent smart charger compatible with almost all cylindrical rechargeable batteries, eliminating the need to own several battery chargers...
  • The D4 automatically detects Li-ion, Ni-MH and Ni-Cd batteries, and through manual selection is also capable of even charging LiFePO4 (LFP) batteries. Use to charge your LED bike light batteries, kids toys, as well as your VAPE batteries etc etc etc.
  • Optimised charging design for IMR batteries, Compatible with and identifies Li-ion / IMR / LiFeP04: 26650, 22650, 20700 (unprotected cell), 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440 Ni-MH and Ni-Cd: AA, AAA, AAAA, C rechargeables
  • Intelligent charging circuitry selects the optimal charging mode (CC, CV and dV/dt) for a given battery and each of the D4’s four microcomputer-controlled charging slots then monitors and charges the battery independently.
  • You can mix size and battery types between the 4 channels / slots. The integrated digital LCD screen clearly displays charging progress, voltage, current & time while an intelligent automatic power-off function terminates current when charging finishes
37819187-sfA0v.jpg
37819187-9A2Bz.jpg
37819187-ZmP1M.jpg37819187-ebHDh.jpgThe RRP from the manufacturer is £38.95 - I'll have to do some reading around!

Mr Baz reviews compares the UM4 with the D4 at 1:18:

(From his comments): The UM4 is a bit longer and wider than the D4. Apparently the D4 doesn't take the 20 or 21700 unprotected cells as it's not long enough.
37819187-TmSGu.jpgUM4 has MicroUSB - D4 has more versatile (for me, anyway) connection options (can just about make them out at the top of the unit in the image below)37819187-Uu7A5.jpgD4 (EU) is apparently the newer version - eg, here according to some, (but others say it isn't and it's a different production run) - Amazon Q&As as contradictory as ever!

Fake news, this "slow charging rate bug" video - one comment says,
"It may not be listed in the manual, but with a bit of research you can discover that this charger has two charging circuits. Slot #1, and #4 is one circuit. Slot #2, and #3 is another circuit. So, if you don't want to halve the charging rate, you need to be using slots #1, and #2, or #3, and #4, or any combination that puts one battery in each of the circuits. Charging 4 batteries will cut the charging rate in half for both channels. NiMH are the batteries that really suffer in charging rate. I have a Powerex C3000 which will charge AA NiMH at up to 2 amps per slot.")
Edited by: "louiselouise" 9th Jun
D4NVT08/06/2019 23:57

How does this fare with Eneloops? Is it any better or worse than a …How does this fare with Eneloops? Is it any better or worse than a 'standard' Sanyo/Pana charger as supplied with Eneloops?


Fine. You just will not know that your 2000mah battery is failing.
Mine all get very near to 1975mah readings on my Lii500, even after several years of use.
Bought the D4 last week for £11.99 when I got a random £5 voucher on one of my ebay accounts.

Very happy with it. Charges much faster than my previous generation (2017) version.
Purchased. Heat added, thanks
louiselouise09/06/2019 00:00

The Nitecore D4 from 7dayshop is here at £16.99 - seems to come with a UK …The Nitecore D4 from 7dayshop is here at £16.99 - seems to come with a UK plug as wellTheir blurb says: Supplied brand new in retail pack: AA, AAA, NiMH to Li-Ion rechargeable batteries. Nitecore D4 is an intelligent smart charger compatible with almost all cylindrical rechargeable batteries, eliminating the need to own several battery chargers...The D4 automatically detects Li-ion, Ni-MH and Ni-Cd batteries, and through manual selection is also capable of even charging LiFePO4 (LFP) batteries. Use to charge your LED bike light batteries, kids toys, as well as your VAPE batteries etc etc etc.Optimised charging design for IMR batteries, Compatible with and identifies Li-ion / IMR / LiFeP04: 26650, 22650, 20700 (unprotected cell), 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440 Ni-MH and Ni-Cd: AA, AAA, AAAA, C rechargeablesIntelligent charging circuitry selects the optimal charging mode (CC, CV and dV/dt) for a given battery and each of the D4’s four microcomputer-controlled charging slots then monitors and charges the battery independently.You can mix size and battery types between the 4 channels / slots. The integrated digital LCD screen clearly displays charging progress, voltage, current & time while an intelligent automatic power-off function terminates current when charging finishes[Image] [Image] [Image] [Image] The RRP from the manufacturer is £38.95 - I'll have to do some reading around!A couple of videos I haven't watched yet(though one comment says, "It may not be listed in the manual, but with a bit of research you can discover that this charger has two charging circuits. Slot #1, and #4 is one circuit. Slot #2, and #3 is another circuit. So, if you don't want to halve the charging rate, you need to be using slots #1, and #2, or #3, and #4, or any combination that puts one battery in each of the circuits. Charging 4 batteries will cut the charging rate in half for both channels. NiMH are the batteries that really suffer in charging rate. I have a Powerex C3000 which will charge AA NiMH at up to 2 amps per slot.")[Video] [Video]


I hV
louiselouise09/06/2019 00:00

The Nitecore D4 from 7dayshop is here at £16.99 - seems to come with a UK …The Nitecore D4 from 7dayshop is here at £16.99 - seems to come with a UK plug as wellTheir blurb says: Supplied brand new in retail pack: AA, AAA, NiMH to Li-Ion rechargeable batteries. Nitecore D4 is an intelligent smart charger compatible with almost all cylindrical rechargeable batteries, eliminating the need to own several battery chargers...The D4 automatically detects Li-ion, Ni-MH and Ni-Cd batteries, and through manual selection is also capable of even charging LiFePO4 (LFP) batteries. Use to charge your LED bike light batteries, kids toys, as well as your VAPE batteries etc etc etc.Optimised charging design for IMR batteries, Compatible with and identifies Li-ion / IMR / LiFeP04: 26650, 22650, 20700 (unprotected cell), 18650, 17670, 18490, 17500, 18350, 16340(RCR123), 14500, 10440 Ni-MH and Ni-Cd: AA, AAA, AAAA, C rechargeablesIntelligent charging circuitry selects the optimal charging mode (CC, CV and dV/dt) for a given battery and each of the D4’s four microcomputer-controlled charging slots then monitors and charges the battery independently.You can mix size and battery types between the 4 channels / slots. The integrated digital LCD screen clearly displays charging progress, voltage, current & time while an intelligent automatic power-off function terminates current when charging finishes[Image] [Image] [Image] [Image] The RRP from the manufacturer is £38.95 - I'll have to do some reading around!A couple of videos I haven't watched yet(though one comment says, "It may not be listed in the manual, but with a bit of research you can discover that this charger has two charging circuits. Slot #1, and #4 is one circuit. Slot #2, and #3 is another circuit. So, if you don't want to halve the charging rate, you need to be using slots #1, and #2, or #3, and #4, or any combination that puts one battery in each of the circuits. Charging 4 batteries will cut the charging rate in half for both channels. NiMH are the batteries that really suffer in charging rate. I have a Powerex C3000 which will charge AA NiMH at up to 2 amps per slot.")[Video] [Video]


I have the d4 for 2 years and love it! I would say it is slow but I charge my batteries overnight or in the morning before I go work everyday so not a problem. It does have a light buzz sound when it is charging but it hasn’t bothered me. Good luck with picking 1!
You guys have confused the hell out of me , I have an i4 however need another one now and literally didn’t know there was this many variations! I’m assuming us4 is better than i4 which is better than d4?
yeah have also been looking to get a smart charger for a while, lots of info/models in this thread but like others, are getting abit confused as to which one to get
No1_Dave09/06/2019 03:22

yeah have also been looking to get a smart charger for a while, lots of …yeah have also been looking to get a smart charger for a while, lots of info/models in this thread but like others, are getting abit confused as to which one to get


Just get an Imax B6.
Much more versatile - Even charged a car battery with it!
Edited by: "omendata" 9th Jun
louiselouise08/06/2019 23:42

The Amazon illustration isn't really helping as you can't see the adapter …The Amazon illustration isn't really helping as you can't see the adapter very well, but seems so.[Image] Weirdly 7dayshop don't have any cables or adaptors in their images for the Nitecore i4 at all, but they do have "Supplied with a 3 Pin UK plug/power lead." in the blurb.I have all sorts of (fast charging/variable output) USB adapters now so I'd probably go for the UM4.



I've go this charger (i4) and it's great. Comes with a figure 8 mains lead.
Edited by: "m1keyp1key" 9th Jun
Can any of you knowledgeable peeps recommend a C/D cell charger? Thanks in advance.
So I couldn't charge 3500 mah 18650 batteries with this charger? Sorry confused as I've never had a charger for my vape batteries.
m1keyp1key09/06/2019 06:57

I've go this charger (i4) and it's great. Comes with a figure 8 mains lead.


The i4 comes with a uk plug but does this? Or can this be used with socket instead of a usb?
Y44SNN09/06/2019 07:43

The i4 comes with a uk plug but does this? Or can this be used with socket …The i4 comes with a uk plug but does this? Or can this be used with socket instead of a usb?


No idea, and no idea why you're asking me. There was a query on the i4 and i was answering it as i have one.

I dont have the um4 so know nothing about it. However a quick google search shows the inputs and no you cant use a figure 8 lead with it.

If you want to use it off a socket just do what you do with any other usb product that needs charging and use a usb mains charger.
Edited by: "m1keyp1key" 9th Jun
danbutcher8609/06/2019 07:43

So I couldn't charge 3500 mah 18650 batteries with this charger? Sorry …So I couldn't charge 3500 mah 18650 batteries with this charger? Sorry confused as I've never had a charger for my vape batteries.


It will fuly charge your 18650!!!
Maximum output of 3000mA per slot is something completely different to your battery capacity of 3500 mAh isn't it?? Please take more caution while reading - it's not that hard
mrblubo09/06/2019 08:04

It will fuly charge your 18650!!!Maximum output of 3000mA per slot is …It will fuly charge your 18650!!!Maximum output of 3000mA per slot is something completely different to your battery capacity of 3500 mAh isn't it?? Please take more caution while reading - it's not that hard


Ok thanks, I think......
So Is the D4 the one to go for?
Dokko09/06/2019 08:18

So Is the D4 the one to go for?


Hmmm. Definitely not in my case...
D4 has a display, I4 doesn't. However the I4 was updated (NEW i4 on packaging) to have a faster charge speed, so does that mean the new I4 is better? Idek
I have never found a charger other than Panasonic ones that will charge a NiMh battery that is completely flat. Any recommendations?
neik09/06/2019 09:21

I have never found a charger other than Panasonic ones that will charge a …I have never found a charger other than Panasonic ones that will charge a NiMh battery that is completely flat. Any recommendations?


I just use another battery to kick start it, like this:
Think its probably time to invest in some decent rechargeable batteries now the kids are burning through them in their toys.

What charger would people recommend (dont care about charge speed) for AAA, AA, C, D. Guess I dont need eneloops for the toys they use often, but if i'm investing in a new charger may aswell get some for the controls and toys they use occasionally.

The Ikea eneloops look good value. What other batteries do those of you with kids (or adults with kids toys ) use?
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