DealExtreme: $12.30 UltraFire 3.6/3.7V Battery Charger

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UltraFire 3.6/3.7V Battery Charger

Price: $12.30

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Overview

Buy 3+ and Save ($10.65 ~ $10.85)

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In Stock: ships in 2 to 4 days (5 to 8 during new year season)

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Charges all 3.6/3.7V lithium batteries (such as 18650 and CR123A*)

Charge single or two batteries at a time

Two separate charging channels - batteries can be mix-charged

Auto-off when batteries are fully charged

UltraFire Model: WF-139

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Reviews

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The main difference between this unit and the DSD charger is that the UltraFire has two separate charging channels. This is a huge difference as you can now safely charge two batteries with different capacity or charge state.

On the downside, this UltraFire unit does require a spacer to charge CR123A and CR2 batteries. It is not available yet but it will be here soon. For now, a piece of a metal (such as paper clip) can be used as a spacer.

** Report on recessed contacts: Customer Ron reported that the positive nodes of the charger is overly recessed into the top of the unit causing problems charging some 18650 batteries and a workaround for this is to bend a paperclip and use it as a filler between the node and your battery. In the meantime, the Ultrafire 18650 batteries charge fine with this charger as is.

Showing latest 4 entries. Click here to read all 75 reviews.

Displaying reviews posted by certified DX gadget owners first, followed by all other posted reviews.
very useful

Posted by emiliogon on 8/2/2009
Involvement: General (knows how to use it) - Ownership: more than 1 month

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Pros: - charges unprotected cells flawlessly!  i've been using these with the LIR 1000mA cells and a NovaTac 120T; this charges up a couple of batteries in just a few hours.
- the cord is great.  i am SO over plug-mount chargers.  this sits on a shelf for easy access, not off on the wall behind my desk.
- i'm just using it for RCR123's, but it'll handle other batteries.  i think it'll take 17670's for when i get the different battery tube for this NovaTac...
 
Cons: - needs spacers for RCR123's.  i use aluminum ferrules (used for crimping steel cable) or a spent .45ACP case (works perfectly, long for good tension).
- one LED is acting a little funny, now.  that side still seems to charge just fine, but the LED is dim when green.
 
Other Thoughts:  
Bottomline: the combo of this and the LIR 1000mA RCR123 cells is the king for regular users of 123 cells!
 
					

Its charging....

Posted by Freakazodiak on 7/26/2009
Involvement: General (knows how to use it) - Ownership: more than 1 month

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Pros: +Works well with protected cells. 
+Shows charging status (green/red).
+Can be modded to charge CR123A cells.
 
Cons: -Makes a high pitched noise, kind of annoying.
 
Other Thoughts: I havent tested the charger with unprotected cells. Its possible that it is overcharging them.
I dont understand how the charger can do 3.6 and 3.7 without a switch. I doubt there is a autosensing circuit. There is a slight difference between both cell types.
 
Bottomline: A relatively cheap charger for 18650 cells. Can be modded for charging with CR123A cells.

Will charge CR123's with magnets

Posted by caddymum on 7/21/2009
Involvement: Expert (understands the inner workings) - Ownership: more than 1 month

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Pros: This charger comes shipped to charge almost all batteries.
No the side post terminals are not connected, but with a couple of rare earth magnets on the end of CR123's you can fit them into the spring loaded terminals.
Very easy to use, and this is my 3rd one from deal extreme.
 
Cons: NONE!
 
Other Thoughts: I would like to see you try to find this charger anywhere else for the same price?
 
Bottomline: You are getting a very good quality charger for under $13.00. Why would you complain in the least about that?
I don't understand some people?

Worth the money

Posted by tabetha on 7/20/2009
Involvement: General (knows how to use it) - Ownership: 1 week to 1 month

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Pros: Easy to use, automatic rate adjust(measured) as become more charged.
Seems to be quite a gentle charger takes a little longer than I first expected but don't mind as always have a spare or two ready charged.
 
Cons: The only con, not that it is a con as such is that you can have the AC cord(US style plug), OR the car cord, no option of both.
The across contacts for RCR123 etc are as said NOT wired up but easy to do as per the details on review.
 
Other Thoughts: Would be nice to see BOTH the AC and car charger lead included, for a $1 more.
 
Bottomline: Does what it says on the tin, would defo buy again.

Specifications

Power source
100V/220V auto AC switch

Compatible batteries
- 3.6V/3.7V CR123A*, 18650, 14500, CR2*, 18500, 17670, 17500 rechargeable batteries

* a spacer is required to charge CR123A/CR2

* Note: the horizontal contacts (the ones on the sides) are disabled by Ultrafire for unspecified reasons. kikkoman reported that these disabled contacts can be re-activated by modding the charger (connecting a few soldering points): http://img293.imageshack.us/img293/4606/dsc00081pi1.jpg. Upon re-activation these horizontal contacts can be used to charge CR123A batteries. You may still need to bend the contacts outward by a bit.

Output: 4.2V @ 450mA

Charging time
- 1 to 2 hours for CR123A batteries
- 2 to 4 hours for 18650 batteries

Length: 5.31 "
Height: 2.36 "
Width: 1.18 "
Weight: 7.58 oz

Length: 13.5 cm
Height: 6.0 cm
Width: 3.0 cm
Weight: 215 gram

Usage Instructions

Insert one or two 3.7V batteries to charge. Since the device has two isolated channels, you can simultaneously charge two batteries with different capacities.

* Note: although CR123A/CR2 batteries can be charged by this unit, a spacer is required to insert CR123A/CR2 batteries into the slots and this spacer is not included in this package.

An official ultrafire spacer will become available soon as an add-on. In the meantime, you may bend a paper clip to charge CR123A/CR2 batteries.