Anyone run out and grab a Vamo V3 yet?

[Ec!g]

I hate when people just do statement whe they really dont know what da heck they are talking about. Ho said stacking batteries is dengerous? In fact is safer since you will double the volt output and you will have less amp drain from the batteries .. Please learn before advice to someone


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Ever heard of reverse charging in Li-ion's?
Look it up

 

[DaxFX]

Ever heard of reverse charging in Li-ion's?
Look it up

What do that have to be with stacking batteries on the vamo? Also chargers have a reverse polarity protection. Please tell me something valid here. Not what you read that someone read from another person read..

This may give you an idea of what i use in a dayli basis

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[Are Jay Maytuh]

Im siding with Dax on this. Been talking to some of my friends who went to MSOE. They dont see what you are talking about with the dangers of stacking. In fact, they say it would most likely be safer since it draws less from each battery, which is what i was thinking, then again, I dont know, so thats why i asked. Been nice to see some more opinions though.

 

[sailense]

Both of those thoughts came to me as i was driving home from breakfast with some friends i havent seen in years actually. Maybe a quick run to lowes/home depot and this will all be fixed.

As far as stacking, I have read a lot of mixed reviews, the only benefit I see is that it is less strain on the batteries. If the battery compartment is vented and there is a circuit board with protection I dont see what all can go wrong....excluding a catastrophic failure, which would happen with a single battery as well, from what i know, which, involving mods, is not a lot. Been doing research, trying to educate myself more on the subject.

The conventional wisdom against stacking was from earlier mods that only detected voltage and would drain stacked batteries past 6.4v. The V3 and other mods that are designed to allow stacking will detect that you have stacked batteries and won't fire below 6.4v in the stacked configuration.

The supported battery configurations for the Vamo V3 are:
- 1x18650
- 1x18350
- 2x18350 (stacked)

 

[Are Jay Maytuh]

The conventional wisdom against stacking was from earlier mods that only detected voltage and would drain stacked batteries past 6.4v. The V3 and other mods that are designed to allow stacking will detect that you have stacked batteries and won't fire below 6.4v in the stacked configuration.

The supported battery configurations for the Vamo V3 are:
- 1x18650
- 1x18350
- 2x18350 (stacked)

Gotcha. I have seen a lot of people saying don't stack and a lot saying its fine (50/50 split) but no evidence as to why its bad. This explains it. Still may just save my 350s for single mode at work since the thing is so damn big with stacked batteries or a single 650.

 

[DaxFX]

I have done some test trying to ignite a Li battery and i only could get one get fire by shooting with my BB rifle. Others attemt with the rifle was negative..they dont explode they fire when lithium mix with oxigen. I have being in the RC world for more than 20 years and if there is someone that really know about this is me

SO DONT SHOOT YOUR VAMO

http://www.youtube.com/watch?v=i_5tLnQTdz0

Edited. overdeischarge will sure damage your battery, they will bring up the internal resistance by miliohms and they would not be able to retain the current and you will not able to charge them.. And in the worst of the case the can lithium will release some gas and depending of the configuration of the battery they can inflate or release the gas


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[Ec!g]

What do that have to be with stacking batteries on the vamo? Also chargers have a reverse polarity protection. Please tell me something valid here. Not what you read that someone read from another person read..

This may give you an idea of what i use in a dayli basis

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First off I didn't specifically say don't stack in the vamo, I said don't stack Li-ion's.
Second i said nothing of chargers.

You want validity? Do some research. Too lazy? I'll do it for you because I'm a nice guy and don't acuse falsely.

Straight from Wiki a quick search:

"Reverse charging
Reverse charging is when a rechargeable battery is recharged with its polarity reversed. Reverse charging can occur under a number of circumstances. The two most important being:

When a battery is incorrectly inserted into a charger
When multiple batteries are used in series in a device. When one battery completely discharges ahead of the rest, the other batteries in series may force the discharged battery to discharge to below zero voltage.
Reverse charging may lead to explosion, leakage, damage to the battery and/or to the device or charger. Old and new batteries and batteries of varying types or brands should not be mixed in the same circuit."

And there are many more articles waiting to be read.

Want actual proof?
I'm a member of CPF and have seen a few bad stories involving stacked Li-ion's.
My favorite example to share: http://www.candlepowerforums.com/vb/showthread.php?280909-Ultrafire-18650-3000mA-exploded

And another http://www.candlepowerforums.com/vb/showthread.php?262234-TK-Monster-Explosion

And as I've said there is a plethora of similar info and examples out there for those that wish to seek it.

 

[DaxFX]

As said before. If a mod is not designed for stacked battery for sure you can over discharge on stacked battery, but with a 6.4v cut off design you will never have a problem even if you tri to drain only ona of the stacked and the other remain full you will have one battery at 4.2v and the other at 2.2v and the vamo cuts off pretty safe..

Again dont tell me what you read from other. Experience and a electrical university grade will teach you, wich i have one in electricity i work for free as part of my RC hobby as a teacher for new pilots teaching how to handle all the new electrical tech involving lithium batteries charger and everithing related to charge rate discharge rates, amps, waats, volts, combination of electrical equipment and for the MOST safety in our flying field, i work with 12cells and 14cells in helicopters with a 100c discharge rate and to be able to teach i do have to know because our flying field is AMA certified.

So please dont tell here that stacking on vamo is not safe just because you read something on a flashligh forum.. This is not a flashlight


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[Are Jay Maytuh]

The stories from the flashlight forum sound like something was defective from the factory (the second one at least).

 

[DaxFX]

The stories from the flashlight forum sound like something was defective from the factory (the second one at least).

Yap, and this is why is important to have vent holes, if the battery start to release gases they need to vent to prevent pressure build the battery itself will not explode the explotion was caused by the pressure builded by the released gases. If that flash was with vent holes i will bet will not explode


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[DaxFX]

By the way, in those flashlight story i think i dont read anithing about stacked betteries. In the second one he clearly said he got 4 batteries and 2 were completly empty an 2 full charged wich non of those 4 battery were propertly stored. A lithium battery must be at a storage mode charge when not in use for a period of time. Obviusly those battery were not in good shape when he recived in that condition.

So no point here to say stacked in vamo is dengarous


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[sailense]

DaxFX and Ec!g bring up some good points. Even though you can stack 18350's, there are some precautions you should take as well:

- always use batteries that have been charged as a pair (this avoids having one fully drained and stressing the other)
- always use protected batteries (most good quality protected batteries protect against over/under discharge and shorts, like AW or Panasonic ICRs)

This is in addition to the other best practices.

 

[LeoRex]

- always use protected batteries

So this excludes IMR batteries (which don't have protection from what I've read)?

 

[Ec!g]

So this excludes IMR batteries (which don't have protection from what I've read)?

Yes and no
First of all not even a protected cell is 100% safe
Second,
IMR batteries on average have much much higher discharge rates than the 5amp limit on the v3(which most users never reach anyway) so they are the preferred go to cell.
But because the vamo has its own built in 'protection', it isn't mandatory to use only protected cells. But even this system isn't guaranteed against failures so some might want the second insurance and go protected.

 

[JustMe2]

I did notice the SS is diferent from chrome and black. On chrome and black you need one of the 2 size tubes for diferent baterias size and the SS is more like the v2 all tubes for long configuration. At least the one in fasttech is like that.

I like better to have just one single tube for each configuration and not 2 tubes for long configuration, that will add too many grooves to the swirl design


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You're right. I had to go back to their website and look over the pictures. The black one I just got has a long single tube for the 18650 batteries and a short tube for the 18350 batteries. The pictures on the website show 2 short tubes only....

I'm glad I got the single long tube instead of having to screw 2 shorter ones together..Interesting.

 

[Lerxst]

The good about having two short tubes is that you won't have a long tube separation issue as both are threaded.

 

[DaxFX]

The good about having two short tubes is that you won't have a long tube separation issue as both are threaded.

Long tube separation? I cant understand what you mean. Look at my signature.


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[Are Jay Maytuh]

Long tube separation? I cant understand what you mean. Look at my signature.


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Im a native english speaker, and a pretty good one, and i have no clue what the hell hes talking about.

 

[DaxFX]

Im a native english speaker, and a pretty good one, and i have no clue what the hell hes talking about.

I dont feel bad now, LOL


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[JustMe2]

Yup, you're going to need to explain that one?

Anyone else get the long tube with their V3? Is it a random thing since I couldn't find an option to choose.