hmmm box mod with a hole with a jamb nut on the bottom to hold that whole deal in?....
The "WeekEnder"
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Seeing as "some people" - (you know who you are, Bap) - build side-winder type mods, perhaps someone has a use for that tube and switch? I've been considering the JM mod kit, myself: I'm used to telescoping now, but felt REAL "Heavy Duty" work-mechs would benefit from one-tube size - and the end caps. (I feel I am a "HazMat" to my poor mechs).
A little confused on how the battery meter works on the DNA20.
Anybody know exactly what that battery meter is supposed to be displaying?
It "seems" that it is not a true proportional indication of voltage left in the battery (as I had thought), but rather a calculated prediction of how much capacity you have left based on the wattage setting (and I presume atty resistance).
I say this because I observed some strange behavior, so I experimented and confirmed it.
Scenario:
So, the battery icon clearly changed based on the wattage I had selected. It changed in a way congruent with how much "time" you had left.
I am thinking of adding a couple of test ports to this mod so I can easily take some voltage measurements, both idle and under load. I figure this is my learning Mod, the Guinea Pig so to speak.
Anybody know exactly what that battery meter is supposed to be displaying?
It "seems" that it is not a true proportional indication of voltage left in the battery (as I had thought), but rather a calculated prediction of how much capacity you have left based on the wattage setting (and I presume atty resistance).
I say this because I observed some strange behavior, so I experimented and confirmed it.
Scenario:
- Battery partially used, probably about 75%
- 1.6 ohm R91
- Wen set to 11w the battery meter showed 50%
- When adjusted down to 7 watts, after taking a hit the battery meter showed 100%
- Wen set back to 11w the battery meter again showed 50% after taking the first hit
- When set to 20 watts it said "Check Battery".
So, the battery icon clearly changed based on the wattage I had selected. It changed in a way congruent with how much "time" you had left.
I am thinking of adding a couple of test ports to this mod so I can easily take some voltage measurements, both idle and under load. I figure this is my learning Mod, the Guinea Pig so to speak.
hum.... that's odd.....I've never experienced what you are seeing.....wonder if it has anything to do with the creative grounding you have in your mod? The battery meter generally moves slowly thru the first 60 to 70% of the display then more rapidly goes to check battery....not an issue, just how it works.... but the battery level changing with wattage setting I've never seen...
I just cranked one of my 20d mods up slowly to 20 watts and no change in battery meter......just to see if I've missed something on the 8 mods I've built with 20d's....I don't recall any other modder mentioning the issue either, but you could always touch base with Brandon on the issue.....let us know what ya find out....
I just cranked one of my 20d mods up slowly to 20 watts and no change in battery meter......just to see if I've missed something on the 8 mods I've built with 20d's....I don't recall any other modder mentioning the issue either, but you could always touch base with Brandon on the issue.....let us know what ya find out....
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IMHO I would bet it has more to do with the battery holder and it's additional circuits than the grounding.
Oh wait you are using the 3200mah 18650's aren't you? Hmm maybe I will change my answer. Sounds like the batts aren't liking the higher load. If so it might change a little after a few break in cycle of the batteries.
Do you have any good 1600 or 2000 18650's to try?
I should be getting one of those holders this week....but I don't have any flat tops.
So side question. It seems like a lot of people get batteries from fast tech, but when I have looked at ordering batteries shipping has been outrageous. Am I missing something?
Oh wait you are using the 3200mah 18650's aren't you? Hmm maybe I will change my answer. Sounds like the batts aren't liking the higher load. If so it might change a little after a few break in cycle of the batteries.
Do you have any good 1600 or 2000 18650's to try?
I should be getting one of those holders this week....but I don't have any flat tops.
So side question. It seems like a lot of people get batteries from fast tech, but when I have looked at ordering batteries shipping has been outrageous. Am I missing something?
Could the shipping cost be due to usps rules on shipping batteries thus FT may ship with another carrier other than usps on their batteries? just a thought...
from FT site......seems batts are shipped express mail.....and
What items are restricted or potentially restricted by the customs and/or air mail shipping services?
For customers' convenience, FastTech carries a wide variety of products, offers a number of shipping methods, and ships to over 200 countries around the globe.
While the vast majority of customers happily receives their products in a timely and orderly manner, at times packages containing certain types of products may be returned to FastTech by the chosen shipper or the destination country's customs. When a package is rejected or returned, FastTech takes steps to resend or refund customers.
List of products that are returned/rejected more often than others:
1.Lithium battery cells (e.g. 18650, 18500, 18350, CR123A, 14500, 10440 lithium batteries, both primary and rechargeable).
2.Flammable liquids such as e-liquids, perfume, and essential oils.
Note that since these products are classified as "dangerous goods" by the Post Union, they are sometimes rejected by air mail service providers such as Hong Kong Post. Post FastTech do pay attention and pack these products with special care, however, product packaging cannot and does not alter how these products are classified by the Post Union.
In addition, despite the Post Union classification, each postal carrier has their own rules and practices. For example, Singapore Post is officially okay with e-liquids. For this reason, FastTech implements automatic packaging routing that redirects packages to various carriers according to your shipping country and content of orders. This automatic routing is applied when you select the "Registered Air Mail" shipping option during checkout.
Last but not least, while most packages do get through all the hops and properly delivers to customers, of you are looking for 100% guaranteed delivery time for lithium batteries and liquid products (i.e. you cannot accept delays caused by rejects and/or inspections), FastTech is able to ship through DHL via their Dangerous Goods shipping service. A custom shipping quote is required as shipping costs depend on the destination country, and quantity/type/brand of items ordered (which affects DHL packaging requirements).
If you're interested in using the DHL dangerous goods shipping service, please contact us and tell us your shipping country and the type and quantity of batteries for a custom shipping quote.
Also saw this on one of the batts they sell.....This product is temporarily unshippable for retail orders due to air freight carrier restrictions. FastTech can still ship wholesale orders with quantity larger than 100 units per order.
from FT site......seems batts are shipped express mail.....and
What items are restricted or potentially restricted by the customs and/or air mail shipping services?
For customers' convenience, FastTech carries a wide variety of products, offers a number of shipping methods, and ships to over 200 countries around the globe.
While the vast majority of customers happily receives their products in a timely and orderly manner, at times packages containing certain types of products may be returned to FastTech by the chosen shipper or the destination country's customs. When a package is rejected or returned, FastTech takes steps to resend or refund customers.
List of products that are returned/rejected more often than others:
1.Lithium battery cells (e.g. 18650, 18500, 18350, CR123A, 14500, 10440 lithium batteries, both primary and rechargeable).
2.Flammable liquids such as e-liquids, perfume, and essential oils.
Note that since these products are classified as "dangerous goods" by the Post Union, they are sometimes rejected by air mail service providers such as Hong Kong Post. Post FastTech do pay attention and pack these products with special care, however, product packaging cannot and does not alter how these products are classified by the Post Union.
In addition, despite the Post Union classification, each postal carrier has their own rules and practices. For example, Singapore Post is officially okay with e-liquids. For this reason, FastTech implements automatic packaging routing that redirects packages to various carriers according to your shipping country and content of orders. This automatic routing is applied when you select the "Registered Air Mail" shipping option during checkout.
Last but not least, while most packages do get through all the hops and properly delivers to customers, of you are looking for 100% guaranteed delivery time for lithium batteries and liquid products (i.e. you cannot accept delays caused by rejects and/or inspections), FastTech is able to ship through DHL via their Dangerous Goods shipping service. A custom shipping quote is required as shipping costs depend on the destination country, and quantity/type/brand of items ordered (which affects DHL packaging requirements).
If you're interested in using the DHL dangerous goods shipping service, please contact us and tell us your shipping country and the type and quantity of batteries for a custom shipping quote.
Also saw this on one of the batts they sell.....This product is temporarily unshippable for retail orders due to air freight carrier restrictions. FastTech can still ship wholesale orders with quantity larger than 100 units per order.
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I ran this by Brandon and he said (paraphrased)....
He's actually correct in his assumption, except for the atty resistance part. It is doing battery profiling rather than voltage metering and is a predictive calculation. The resistance is irrelevant as watts are watts regardless.
On the battery holder.....will certainly affect results and would explain the 'check battery' on higher wattage settings. The holder cannot sustain the amp draw.
Thanks Retird, that confirms I am not going crazy.
I have also confirmed what he said about the battery holder. It works fine but starts showing its weakness at high watts after the battery has been drained some. I can get 20 watts on a fully charged battery, but once the battery drains a bit I cant. I am unsure if it is the bat holder or the 18650Bs holding me back. I am able to get 15 watts pretty easily though, which means I can vape this no problem as I usually vape at 11w. I am going to take Baps suggestion and try some 10amp batteries and see what happens.
I have also confirmed what he said about the battery holder. It works fine but starts showing its weakness at high watts after the battery has been drained some. I can get 20 watts on a fully charged battery, but once the battery drains a bit I cant. I am unsure if it is the bat holder or the 18650Bs holding me back. I am able to get 15 watts pretty easily though, which means I can vape this no problem as I usually vape at 11w. I am going to take Baps suggestion and try some 10amp batteries and see what happens.
Found these specs on an EU site.......may be helpful....
Panasonic NCR18650B 3,6V 3400mAh (2C)
Manufacturer: PANASONIC
Battery Size: 18650
Capacity: 3400 mAh
Capacity (minimal): 3150 mAh
C Rating: 2 C
Voltage (nom.): 3.6 V
Discharge End Voltage: 2.5 V
Height: 65 mm
Diameter: 18 mm
Weight: 45 g
Panasonic NCR18650B 3,6V 3400mAh (2C)
Manufacturer: PANASONIC
Battery Size: 18650
Capacity: 3400 mAh
Capacity (minimal): 3150 mAh
C Rating: 2 C
Voltage (nom.): 3.6 V
Discharge End Voltage: 2.5 V
Height: 65 mm
Diameter: 18 mm
Weight: 45 g
I had a hard time find discharge current specs on that Panasonic bat, the only place I saw it quoted was at 1C. If 2C is accurate, then the batteries are not my bottleneck. 3400mah at 2C would be 6.8a, time two bats and I would get over 13a.
I will stick these Sony US18650VTC3 bats in there and see what happens. They are rated for 30A continuous discharge, so that will totally eliminate batteries as any kind of bottleneck.
I will stick these Sony US18650VTC3 bats in there and see what happens. They are rated for 30A continuous discharge, so that will totally eliminate batteries as any kind of bottleneck.
Are all your batteries broke in? (~5 charge cycles)
I didn't notice it so much on my latest 1600 AW's but I noticed a pretty substantial difference on a couple of MNKE 26650's
Where did you get the 30a Sony's from?
I didn't notice it so much on my latest 1600 AW's but I noticed a pretty substantial difference on a couple of MNKE 26650's
Where did you get the 30a Sony's from?
Hey mike, just read through the entire thread, great work. I thought I was special when I decided to go with that Atty connector...obviously I'm not the unique snowflake I thought I was. I just got my fasttech connector yesterday, and yes it leaves something to be desired. If I may be so bold, if you are going to buy a whole mod to replace the connector, buy this one: http://www.fasttech.com/product/1425200-sentinel-m16-telescopic-mechanical-mod. I have this mod, the top cap is identical to the aluminum one, but made of brass, and the threads are much more robust. This would allow an easy swap. No soldering required! Just unthread your aluminum top cap, pop out the center delrin, pop the delrin into the brass cap, and reassemble.
Great tip about the shared grounds, will have to use that info when I assemble mine.
About reverse polarity protection, someone a few pages back asked why a diode can't be used. Even with a nice schottkey diode, mamu had too much of a voltage drop. I'm going to be using the si4477dy p-mosfet, which mamu found to have negligible, <0.1, voltage drop iirc.
Sent from my Nexus 7 using Tapatalk
Great tip about the shared grounds, will have to use that info when I assemble mine.
About reverse polarity protection, someone a few pages back asked why a diode can't be used. Even with a nice schottkey diode, mamu had too much of a voltage drop. I'm going to be using the si4477dy p-mosfet, which mamu found to have negligible, <0.1, voltage drop iirc.
Sent from my Nexus 7 using Tapatalk
No, these Panasonics are not broke in yet.
I got my Sonys from FT before the battery shipping drama heated up to its current level. The Amazon link retird posted looks good. If shopping though, be aware that Sony now has a VTC4 which is 2100MAH.
Nice suggestion on the Brass Mod, and I will consider it. I like the plug n play concept of it, and now that I have heard someone speak well of it I am less skeptical.
I bought these, they should be here next week.
3 Sony US18650VTC4 High Drain 30A Rechargeable Li on 18650 Battery 2100mAh New | eBay
Just as an FYI, that aluminum 510 connector was a BUST!
Broke the Mod open to swap out the batteries and evidently that was the last cycle it could handle of screwing the SS R91 into the aluminum threads. It striped when I tried to put my R91 back in!!!!
Debating if I want to wait on China for another connector, or sacrifice this Nemisis clone I already have to the cause. Fortunately my Gennys have more thread on them than the R91 so I can still use them on the Mod while I decide.
FYI: OD of R91 threads = 6.7mm, OD of GKMF atty threads = 6.95mm.
BTW, I was able to easily vape at 20w with these Sony batteries. The Panasonics measured 3.8v when I pulled them. Freshly charged Panasonics worked too so I need to wait until these Sonys have drained a bit and try 20w again. I suspect that as the voltage drops, more current is required by the DNA to boost the voltage, so I still dont know if it was the bats or the holder. Leaning towards the holder at this point, but these new bats will tell the story for sure.
Broke the Mod open to swap out the batteries and evidently that was the last cycle it could handle of screwing the SS R91 into the aluminum threads. It striped when I tried to put my R91 back in!!!!
Debating if I want to wait on China for another connector, or sacrifice this Nemisis clone I already have to the cause. Fortunately my Gennys have more thread on them than the R91 so I can still use them on the Mod while I decide.
FYI: OD of R91 threads = 6.7mm, OD of GKMF atty threads = 6.95mm.
BTW, I was able to easily vape at 20w with these Sony batteries. The Panasonics measured 3.8v when I pulled them. Freshly charged Panasonics worked too so I need to wait until these Sonys have drained a bit and try 20w again. I suspect that as the voltage drops, more current is required by the DNA to boost the voltage, so I still dont know if it was the bats or the holder. Leaning towards the holder at this point, but these new bats will tell the story for sure.
Thanks, added that guy to my Favorite Sellers, he has a nice selection.
mnke
http://.........blogspot.com/2013/11/black-weekend-mnke-18650-30a-60a.html
http://.........blogspot.com/2013/11/black-weekend-mnke-18650-30a-60a.html
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