DealExtreme: Battery Charger UltraFire 3.6/3.7V (UltraFire 3.6/3.7V Battery Charger)

Today I will talk about the UltraFire 3.6/3.7V Battery Charger (UltraFire 3.6/3.7V Battery Charger), that came in last package I received from DealExtreme, and is for charging Lithium batteries 14500. I bought batteries and ordered the charger using my DX Points, after all no use having rechargeable batteries without a charger, and NiMH batteries is not for lithium batteries 14500, because despite having an equal format, the voltage and the internal components are totally different. What good charger and batteries 14500? To The searchlight, but is entirely optional, since it also uses rechargeable AA battery or common.

The battery charger 3.6 / 3.7V is the Chinese brand UltraFire, trade mark owned by company Wha Fat Technological Co., Ltd.. Ultrafire is also the mark of flashlight where batteries are used. The charger model is the WF-139, accepts as input any voltage between 100 e 240 (alternating current – AC) or 12V (direct current – DC), it is useful to use it in car, but the 12V cable is not included, only the AC power cord is included. The plug is in the good old US standard, compatible with most manufactured Brazilian taken before 2009, before Inmetro oblige all Brazilians to adopt an idiot standard proposed by the seller of ABNT (had to be) which makes it incompatible with Brazilian taken virtually everything manufactured outside Brazil, in which case you must use an adapter. The output is DC (DC) de 4.2V and 450mA (I can not tell if it is broken when using the two channels), but the channels are independent.

Carregador de baterias de lítio 3.7V UltraFire

Lithium battery charger 3.7V UltraFire

Parte inferior do carregador, com as especificações

Bottom of the charger, with specifications

The charger can be used to carry various types of lithium batteries beyond 14500, they are: 17500, 17670, 18500 and 18650, because the contacts of the negative pole has springs that allow you to adjust various battery sizes. CR123A and CR2 batteries can also be charged, but require the spacer to be smaller, a paper clip seems to get the job done. Interestingly there are specific contacts in charger for these batteries, but reports are that they are off internally (I did not open my to verify), the specifications and says nothing about this type of batteries, This can not be considered a defect.

Encaixe do cabo de energia 100-240V (incluso)

Attach the power cord 100-240V (even)

Encaixe para um plug DC de 12V, ideal para automóveis (não incluso)

Fit for a 12V DC plug, ideal for cars (não even)

The charger has a pair of LEDs that indicate the status of each of the individual channels, Red indicates that the battery is charging and green indicates that charging is complete, or that there is no battery (is not a failure, as the charger can not know if it is out of battery or was the battery protection circuit that opened the circuit for charging is complete). The charging time for battery 14500 is specified as 2 a 4 horas pela DealExtreme, which seems correct, since I bought batteries has capacity 900mAh, and so take about 2 hours for loading 450mA which is the charger output, or 4 hours if they are two batteries and the voltage is divided by the two channels. The batteries that had already received some charge, and so the time to complete them was slightly larger than 1 time, I have not done any full charge. As my batteries are protected can not tell if who cut the load when the battery was already fully charged was the battery protection circuit or the charger itself, but the charger should also have its own circuit for detecting full charge, especially considering the danger of a possible overload.

Os LEDs verdes indicam carga completa (também acendem quando não há bateria)

Green LEDs indicate full charge (also light up when no battery)

LEDs vermelhos indicam que as baterias estão carregando

Red LEDs indicate that the batteries are charging

The packaging is sturdy plastic, It has the mark of the Ultrafire and below says “Battery charger for NiMH rechargeable batteries / NiCD / lithium”, which can cause some confusion, because the WF-139 model should in no way be used in NiMH or NiCd batteries, which has lower voltage and could explode or easily damaged if placed in 4.2V voltage charger. What happens is that the same package is used for the WF-138 chargers, WF-168, WF-170 e WF-105, the first was specific for CR123A batteries and the other three AA and AAA batteries (and the latter also for 9V batteries). Should be marked on the packaging which is the model that is there, but apparently forgot to schedule, But the label on the back of the charger leaves no doubt that he is a WF-139.

A embalagem que serve para vários modelos de carregadores da TrustFire

The package that serves a number of connectable models of TrustFire

Parte traseira da embalagem com as especificações de cada modelo

Packing back to the specifications of each model

And I'm ending here, information about the package, etc. have been placed in a previous article here on Skooter Blog, so I will not repeat them again. If you also want to shop in DealExtreme, directly from Hong Kong, click here and good shopping.

Update (11/05/2011): Incluído vídeo do Carregador de Baterias 3.6/3.7V UltraFire (UltraFire 3.6/3.7V Battery Charger) operation:

Update (12/05/2022): Após esses 11 years, o produto não está mais disponível na DX. Recomendo a compra deste carregador similar da Varicore, more features, on AliExpress.

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Friend, if you can help me thank you.
I was in Hong Kong of mail site, I put my tracking number that begins with RB and ends with HK.
And it appeared that.

Outward Registered Letter

Destination – Brazil
The item (RBNÚMEROSHK) left Hong Kong for its destination on 14-Mar-2010

Could you tell me what to say msg ? Obg.


Fabricio, first time I buy this site.
Where can I see if it already came to Brazil ?
Thanks for listening!


Already I tried and could not,
says Objects not found


has already 9 days, this is normal ?
you can tell how long to arrive at the residence ?


Bought 2 Laser, gave 28.81 Dollars.
I wanted to know roughly how long it takes to arrive at my house
Thank you and good day !


Our, It takes too long.
you know some cool site to buy surf clothing ?
that the form of payment is paypal.
Brands, Billabong, Quiksilver, Rip Curl, Lost e etc.



mas quanto tempo você acha que demora pra aparecer no site dos correios
que o item já esta no brasil ?
has already 9 days and nothing ;/


The item (RBNÚMEROSHK) left Hong Kong for its destination on 14-Mar-2010.
mais essa msg quer dizer que o produto ja ta vindo né ?
ou essa msg nao garante nada ?

Valeu msm pela atençao!


Então to tranquilo 😉
Thanks for the information!


Fabricio, now I tried to buy some clothes in paypal,
there appeared this msg!

” You can not use an email address or card number belonging to a PayPal account. If you have a PayPal account, log in If you do not, change the email address or card number and try again.”

When buying exchanged email, msm so also of the msm msg.
I do not remember what my account of this card ;(

you can say if you have to cancel the account of this card on PayPal and I create another ?


Opa fabricio, I'm one doubts because I efetuei a purchase on the DX so qn appears in the order summary, or takes a while to appear?


I paid for paypal, I think q was at Express checkout, email paypal has q be the same as the account dealxtreme?

Matheus Perini

Fabricio, first, Your site eh otimo, very help their references and reviews!!!

I saw you buy enough batteries, and I was wondering if you could take me help…
I have a sony battery charger used to

“Charges Batteries AA / AAA Ni-Cd / Ni-Mh até 04 Batteries at a time.”

And would buy more rechargeable batteries in dealextreme that serves to recharge it also … but I do not know anything about brand, Battery power, could help me ???

Thank you =)


You have some battery that dealextreme recommend the site to use it min ?

Matheus Perini

I ended up picking up a kit of Soshine, Espero que Fair boas.

Thanks for the tips Fabricio.

Patrick Sleigh

Fabricio, congratulations on site, managed to get many questions I had regarding import through it.
I have a doubt, these batteries can be used in cameras?


Opa, these batteries last longer than ordinary alkaline?


Friend bought a laser in dx came a battery and a charger TrustFire at first it came defective one of the loose charger poles give now packed. ums of days to ca went load and reversed the poles of the battery and let the night
danificou battery will qjue. remember that after tidy the charger was working.

[…] When I started buying lanterns from China, I got interested in lithium ion batteries, such as 14500, that is the size of an AA, but they offer higher voltage and more light in the lanterns that support them. I needed a specific charger for them and I bought an Ultrafire, whose review I did here on the blog at 2010. […]

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