Unfortunately, this deal is no longer valid
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

51
Posted 20th Aug

This deal is expired. Here are some options that might interest you:

Last seen was £17.99 on Gearbest, this just came back in stock

The 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.

Specifications
Input: Requires any USB port (cable included) Use your computer or a mains to USB adapter or even a powerbank etc.
Outputs (automatic selection dependant on batteries): 4.35V±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
Quick Charge Mode Output: 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 / Lithium-ion / LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650 (flat and high top), 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 grams)
Intelligent and independent Four-Slot / 4 Bay 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 (Lithium Ion), Ni-MH (Nickel Metal Hydride) and Ni-Cd (Nickel Cadnium) technology batteries with automatic detection of battery chemistries.
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
Community Updates

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Top comments
Chumni3820/08/2019 19:12

Pardon my ignorance but max charge is 1500ma and their official marketing …Pardon my ignorance but max charge is 1500ma and their official marketing material has the charger pictures with 3500mah, 3000mah etc. batteries???



The charge (1500mA) is the current supplied to the battery (charge speed essentially the higher it is the quicker it charges - going too high is not generally recommended, though this should be ok) - the 3500mAh is the capacity (how long it lasts) of the battery, 2 different things.
Also with my current nitecore D4 the charge rate drops by 50% (as does the UM4 listed) if charging three/four at once, and that's for all chemistry types - be it Li-ion, NiMH or whatever, something to consider when buying a charger if regularly charging 3 or 4 cells, mine takes around 6 hours to charge 4 x AA's! . This is a rerasonably good charger for the price for sure.
An in depth review here - BLF
Edited by: "Stormpooper" 20th Aug
great price but personally would pay the extra and go for Nitecore UMS4 to get the QC and 3A charging benefits
Edited by: "coalfield" 21st Aug
mccririck20/08/2019 17:59

Don't need but want...



Almost exactly that - but didn't stop me for ordering one! I needed to be able to charge more than one 18650's - honest. My single charger is a bit flakey too - says he - rehersing his excuses for when the postman rings "again"!
51 Comments
Just got the stock alert email notification. Ordered
Don't need but want...
mccririck20/08/2019 17:59

Don't need but want...



Almost exactly that - but didn't stop me for ordering one! I needed to be able to charge more than one 18650's - honest. My single charger is a bit flakey too - says he - rehersing his excuses for when the postman rings "again"!
Great chargers, heat
may give this a go, always make nice presents for the newly converted.
Pardon my ignorance but max charge is 1500ma and their official marketing material has the charger pictures with 3500mah, 3000mah etc. batteries???
Chumni3820/08/2019 19:12

Pardon my ignorance but max charge is 1500ma and their official marketing …Pardon my ignorance but max charge is 1500ma and their official marketing material has the charger pictures with 3500mah, 3000mah etc. batteries???



The charge (1500mA) is the current supplied to the battery (charge speed essentially the higher it is the quicker it charges - going too high is not generally recommended, though this should be ok) - the 3500mAh is the capacity (how long it lasts) of the battery, 2 different things.
Also with my current nitecore D4 the charge rate drops by 50% (as does the UM4 listed) if charging three/four at once, and that's for all chemistry types - be it Li-ion, NiMH or whatever, something to consider when buying a charger if regularly charging 3 or 4 cells, mine takes around 6 hours to charge 4 x AA's! . This is a rerasonably good charger for the price for sure.
An in depth review here - BLF
Edited by: "Stormpooper" 20th Aug
Brilliant charger

Use it for me 18650 batteries and takes about 3hours to juice up two of them
Got this a few months ago. Great charger for 4 18650s.
Charges to full in just a few hours at 1,000mA, can charge at 1,500mA if u use a QC charger to power it.
Very fiddly for AAAs though.
Amazon trying to compete. £15.47
Does this product includes batteries also ?
santosh8920/08/2019 20:19

Does this product includes batteries also ?

I don't believe it does. For the price stated, an inclusion of batteries would be amazing!
great price but personally would pay the extra and go for Nitecore UMS4 to get the QC and 3A charging benefits
Edited by: "coalfield" 21st Aug
This or the Nitcore i4 charger from 7day Shop? Same price :-

7dayshop.com/pro…-i4
It's good buy it
Would this charge my 2500mah Duracell AA's ?
Use this to charge my NIMH and lithium 18650 torch batteries, seems to work but is very fussy about positioning the batteries, especially NIMH. It also chooses the battery health (poor or good) like a roulette wheel.
Everyone loves a battery charger
Bought the D4 model a few weeks ago from 7dayshop, brilliant charger. This USB model is a good price if you already have a decent USB adapter.
Edited by: "Darude" 21st Aug
TacticalTimbo20/08/2019 22:00

It also chooses the battery health (poor or good) like a roulette wheel.


Ditto that!
Does this come with the batteries in the pic too??
ferdy14721/08/2019 06:00

Does this come with the batteries in the pic too??


Charger only.
coalfield20/08/2019 21:25

great price but personally would pay the extra and go for Nitecore UMS4 to …great price but personally would pay the extra and go for Nitecore UMS4 to get the QC and 3A charging benefits


Considerably more expensive than this and the VC4S which looks a similar spec to that?
I bought this the same price June, it’s a bit chunkier than I imagined but works great!
Darude21/08/2019 05:42

Bought the D4 model a few weeks ago from 7dayshop, brilliant charger. This …Bought the D4 model a few weeks ago from 7dayshop, brilliant charger. This USB model is a good price if you already have a decent USB adapter.


Hi Darude, so is the D4 better as it's mains, and do you think worth the extra cash? I can only see this charger on for £15.99, have I missed it or am I missing a code?
Showing for 15.99.
Anyone else?
15.99 now
coalfield20/08/2019 21:25

great price but personally would pay the extra and go for Nitecore UMS4 to …great price but personally would pay the extra and go for Nitecore UMS4 to get the QC and 3A charging benefits


I got the NITECORE SC4, Its awesome but it wasnt cheap (where with hindsight the one on offer here would of done ......)
Price gone up now to £15.99
Anyone purchased a Nitecore charger and experienced it getting very hot during a charge? Mine is too hot to hold after maybe 10 seconds, slightly concerned but doesn't ever seem to get 'hotter' than a certain point during the whole charge cycle.
obwan201421/08/2019 11:07

Hi Darude, so is the D4 better as it's mains, and do you think worth the …Hi Darude, so is the D4 better as it's mains, and do you think worth the extra cash? I can only see this charger on for £15.99, have I missed it or am I missing a code?


I think performance is the same. But it was worth it for me as I don't have a spare USB adapter.
Can't see any specific mention of our on the site, but can it run a full discharge cycle to test the capacity of the cells, or otherwise get an accurate reading of their capacity?

Most "smart" chargers I've found that claim to measure capacity only do it over a small time and extrapolate it to get an estimated figure
M_Sherwood21/08/2019 11:52

Anyone purchased a Nitecore charger and experienced it getting very hot …Anyone purchased a Nitecore charger and experienced it getting very hot during a charge? Mine is too hot to hold after maybe 10 seconds, slightly concerned but doesn't ever seem to get 'hotter' than a certain point during the whole charge cycle.


Doesn't sound right at all. I have an intellicharger and use it for 18650 to AAA. Gets warm.
£15.99 now same as Amazon and easier to return if any problems with Amazon
Shame I missed the £14 price, but this has been sat in my basket for a while. Bought and heat added!
Chumni3820/08/2019 19:12

Pardon my ignorance but max charge is 1500ma and their official marketing …Pardon my ignorance but max charge is 1500ma and their official marketing material has the charger pictures with 3500mah, 3000mah etc. batteries???


ma is the current the batteries are charged at, mah is the capacity.
Excuse my ignorance...

I'm continually buying AA or AAA batteries so this seems ideal...

I guess it won't recharge my current dead duracell batteries so wher do I buy the rechargeable AA & AAA ones to work with this charger?

Thanks in advance
Don't need, don't want, it's arriving Friday, thanks OP
memyhead21/08/2019 15:11

Excuse my ignorance...I'm continually buying AA or AAA batteries so this …Excuse my ignorance...I'm continually buying AA or AAA batteries so this seems ideal...I guess it won't recharge my current dead duracell batteries so wher do I buy the rechargeable AA & AAA ones to work with this charger?Thanks in advance


Unless they're rechargeable, you won't be able to :P

I'd recommend (and I'm sure a few others here will too) are the LADDA batteries from Ikea.
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