Review - The J0ker

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GrandPoobah

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Apr 7, 2010
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Brooklyn, New York
On Friday I received my newest PV, "The Joker". Its a pretty straightforward 5v device with a 510 or 901 connection. The model I got has the 510 connector.

On opening up the package, the first thing I noticed about the Joker is how lightweight it is. It is also extremely thin, the casing being only slightly larger in diameter than the rcr123a batteries. I also noticed a fair amount of scratching to the outside of the unit, lengthwise down one side. The scratches look to me like the body was shoved through a hole that was slightly too small.

4 batteries and a charger came with the joker. Oddly, the Vapor Talk site mentions that its made to use 750mah rcr123a batts, but the batteries I received were marked 400mah. I chose to use my standard Tenergy 750mah batts instead as those were what the device was "designed for".

As for vaping, I really like the button. I dont think there is much risk of "pocket firing" as its fairly stiff to press. Vapor production is absolutely fantastic. I have a 5v GLV which is my go-to device and I have to say the Joker is right on par with that.

Some people may have watched the youtube video where they put on an LR atty to test the protection circuit. In the video the light goes from Green to Blue then shuts the joker down. Mine goes from Green to Blue and the light shuts off too, however, the atty still has power and I can continue to vape. I have to say, a big FAIL on the protection circuit.

All in all I do like the device. The vapor is huge and booming, and its about as small and light as a 5v device could be. I was however disappointed with the scratches and the protection circuit. I cant honestly say its particularly better than my 5v GLV. The GLV is $95 vs the Joker's $169 (though it does come with those 4 400mah batteries and a charger).

So do I recommend the Joker? No. I cant say its worth the money. $169 (I did pay less due to preorder) would be acceptable if the protection worked right and there weren't machining scratches. Also the 400mah batts were a pretty sad addition. That said, I'm still going to keep it since its super lightweight, small (for a 5v), and the vapor production is really fantastic. I just cant say its worth the premium pricetag.

Sorry to be a downer, but that's just my opinion....

And FYI, I have no affiliation with Great Lakes Vapor. The GLV just happens to be the only other 5v device I own.

** Update - The "brass" on the atty connector has completely rubbed off after 5 days. I personally think it looks better like this since it matches the bottom now.
 
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stubear62

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Sep 27, 2009
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Hi Grand,
Did you ever think that the device you got might have been a bad one to begin with? I have seen problems that others get from VaprLife and this unit is suppose to be the safest or at least one of the safest ones out there.
If I were you, I would email Mary and ask questions or let them know what is wrong with it.
They do care for their Customers and if this problem you have is true, it may cause you personal injury.
Please let them know what is wrong with your unit as I'm very sure they would want it back and to take it apart to see maybe one slipped thru the cracks.
I also don't want to see anyone get hurt from these device's..
 

GrandPoobah

Senior Member
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Apr 7, 2010
114
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Brooklyn, New York
Hi Grand,
Did you ever think that the device you got might have been a bad one to begin with? I have seen problems that others get from VaprLife and this unit is suppose to be the safest or at least one of the safest ones out there.
If I were you, I would email Mary and ask questions or let them know what is wrong with it.
They do care for their Customers and if this problem you have is true, it may cause you personal injury.
Please let them know what is wrong with your unit as I'm very sure they would want it back and to take it apart to see maybe one slipped thru the cracks.
I also don't want to see anyone get hurt from these device's..

I plan to, but I've heard similar issues from other people. If the issues get corrected, I'll update the review accordingly. For now, I think the review is fair as I cant help but think these were sent out untested. See this thread http://www.e-cigarette-forum.com/forum/requests-opinions-reviews/94046-joker-5v-any-reviews.html
 

stubear62

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Sep 27, 2009
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Myrtle Beach, SC
Grand,
Your Review was a very informitive one and didn't mean anything by it being no good. Thats my bad. Yes, I have seen a lot of users not happy with this and the pricing is way too high.
I hope you are and will be careful when and if you use this device.. As I have said b4, I don't want to see people getting hurt. Not a good thing..
I just hope that Vaprlife gets it together and see's whats going on.
Maybe a "Toyota" type of recall? LOL..
 

Hyperspace

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Mar 4, 2009
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I think it's regulator is not working right. So when fully charged its probably up to like 7-8v... How else could you explain it frying attys, but my GLV-2 (regulated at 5v) hasnt fried one!

There is no regulator in the Joker and with fresh batteries it's putting out 6.5 volts.

Joker Volts - Vapor Talk E Cig Forum
 

tonyorion

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Jun 8, 2010
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First, I will admit that my review is colored by the terrible experiences with Vaprlife's customer service, and their socking it to me for a 15% restocking fee + postage for a clearly defective unit, 6 days to answer my first complaint, and then guarantee me 5 days turnaround on a warantee repair! There are, IMHO, some serious issues with the heat dissapation of the Joker AV.

Why would they put such a puny 3 V 400 mAh on such a big mod? Everything from Screwdrivers, Chucks, Ego's. etc., etc., etc. offer much higher capacity batteries. Even though you need to stack batteries in series (like a flashlight) to get the extra voltage, there are plenty 3.7 V 800 to 900 mAh protected batteries on the market; there is even a 3 V 880 mAh available, but the latter tested all at 3.7 V in the different reviews that I read. It is not a question of cost since these batteries are all in the same ball park price wise from China. They would appear to fit into the Joker.

The reason is quite simple for not offering the higher voltage: the Joker has a serious problem with heat dissipation. Any unused voltage (3+3 V= 6v, or 3.7+3.7 V = 7.4 V) will get turned into heat because of the way the Joker is wired. Using a surface probe, I measured a whopping 35°F increase in temperature in the top portion of the body when vaping at 4.3 V with 6 V batteries. The Joker would scorch you if it had an extra 1.4 volts to get rid of. Also, the body of the unit stayed relatively cool (increase of about 8°F), but that kind of temperature rise would happen just from holding it. It appears that all of the heat stays in the head where the variable resistance and protection circuitry is located. Not a good design!!!

Normally, I would've given Vaprlife in the Joker the benefit of a doubt since my unit obviously had something wrong with it, but the terrible customer service combined the questionable and only choice of batteries, leads me to believe that you would be better off shopping elsewhere for adjustable voltage units. I sent mine back!
 

candre23

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Mar 12, 2010
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I don't know if you guys were just extremely unlucky or if the joker has undergone an internal redesign, but none of these issues exist with the joker I bought last week.

Risking cardiac arrest in the name of science, I just vaped 20 drops (~1ml) of low nic liquid over the course of 15 min. I vape a lot, but this was excessive even for me. I doubt many people will chain-vape harder than this on a regular basis, but I wanted to get a "worst case scenario" for my measurements. Trial conducted using a fixed 5V joker with a bauway 2.5ohm (2.35ohm measured, accounting for lead resistance) atty and two AW 3.7V IMR 16340 550mAh batteries. I do not have the ability to test an actual atty in line with the mod, so I used a 3ohm dummy resistor for loaded voltage measurements. Voltage and resistance was measured with a Fluke digital multimeter, temperature with a Turnigy IR temp probe.

Before chain-vape session
Battery voltage: 7.70V
Unloaded voltage from joker: 4.99V
Loaded voltage: 4.75V
Temperature: 75.5F (consistent across entire device)

After chain-vape session
Battery voltage: 7.35V
Unloaded voltage from Joker: 4.99V
Loaded voltage: 4.74V
Temp. of top section: 97.5F
Temp. of battery section: 91F
Temp. of atty (external): 120.5F

From this data, we can interpret a few things. The first is that the joker is not using a diode or resistor to drop the battery voltage. The battery voltage was significantly lower after the test, yet both the loaded and unloaded voltages were consistent - therefore it must be using a proper regulator. The second is that while it got warm, it certainly didn't get "hot". This test was done with high-drain IMR batteries, which in theory should create more waste heat than standard 3V or 3.7V li-ions.

I'm sorry you guys are having problems with your jokers, but mine is working exactly as it should. Perhaps they changed the design when they lowered the price. Whatever the case, the current jokers are not an inherently defective design.
 

BiancaMontgomery

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Jan 27, 2010
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I don't know if you guys were just extremely unlucky or if the joker has undergone an internal redesign, but none of these issues exist with the joker I bought last week.

Risking cardiac arrest in the name of science, I just vaped 20 drops (~1ml) of low nic liquid over the course of 15 min. I vape a lot, but this was excessive even for me. I doubt many people will chain-vape harder than this on a regular basis, but I wanted to get a "worst case scenario" for my measurements. Trial conducted using a fixed 5V joker with a bauway 2.5ohm (2.35ohm measured, accounting for lead resistance) atty and two AW 3.7V IMR 16340 550mAh batteries. I do not have the ability to test an actual atty in line with the mod, so I used a 3ohm dummy resistor for loaded voltage measurements. Voltage and resistance was measured with a Fluke digital multimeter, temperature with a Turnigy IR temp probe.

Before chain-vape session
Battery voltage: 7.70V
Unloaded voltage from joker: 4.99V
Loaded voltage: 4.75V
Temperature: 75.5F (consistent across entire device)

After chain-vape session
Battery voltage: 7.35V
Unloaded voltage from Joker: 4.99V
Loaded voltage: 4.74V
Temp. of top section: 97.5F
Temp. of battery section: 91F
Temp. of atty (external): 120.5F

From this data, we can interpret a few things. The first is that the joker is not using a diode or resistor to drop the battery voltage. The battery voltage was significantly lower after the test, yet both the loaded and unloaded voltages were consistent - therefore it must be using a proper regulator. The second is that while it got warm, it certainly didn't get "hot". This test was done with high-drain IMR batteries, which in theory should create more waste heat than standard 3V or 3.7V li-ions.

I'm sorry you guys are having problems with your jokers, but mine is working exactly as it should. Perhaps they changed the design when they lowered the price. Whatever the case, the current jokers are not an inherently defective design.

I'm thrilled to know this because that green Joker is calling my name. :) I loved my Turbo, love my Pearl and I'm sure I'll love my little VyperSS as soon as it arrives. Must. Have. Green. Joker.
 
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