Sony VTC5

[arron]

Sept 27, 2014 12:50:45 GMT Montana said:

Sept 27, 2014 12:24:22 GMT arron said:

I use the purple efest, both 30a and 35a.
Perfect for me, good battery life, good price and readily available!

I don't enjoy sub ohming, and i don't go above 10a when I do use a dripper (which is rare)

If purple efest are good enough for grimmgreen then they're good enough for me

I seem to have had a couple of their not so good ones, less than two months old, and not lasting that long "in the green" in my VTR.So I think I'm going to have to get some from Torchy.

Some have been known to be ok and some not, there seems to be a big variation in quality , pity for 2 reasons , first - on paper they seem to be good , secondly - price and availability.


Andy

Are your efest def not fakes? A lot of fakes around which could explain poor battery life??

[Montana]

No way of really telling without taking  the wrapper off and I don't really want to be doing that and they were bought from a reputable dealer on here , so I have no reason to say they are.

Having said that , I remember seeing a video the other day about the AW batteries and their fakes , and a dealer had bought these high up the dealer chain and if they didn't know then there seems to be a problem with batteries worldwide.Also without being someone like Phil Busardo or our own ronaldo and knowing how to test these properly and knowing what to look for properly , we are all at the mercy of the fakers doing.
In the same video ( and I still can't remember where ) they were talking about the VTC5's and the conflicting rumors about them being stopped or just a delay because of the disaster in Japan that happened and they  had to move production and build another facility.I would hope that Sony see this as being another revenue stream for them and it's just a blip until production can get up to speed again.I presume that the bulk go to the laptop industry and the rest get distributed when they can.


Andy

[VapingBad]

Montana measuring the internal resistance will give you a good idea (you will never measure is as low as the specs on home equipment, but under 0.035 ? is what I would expect for very high drain). This video explains how.

[Montana]

Sept 27, 2014 19:28:20 GMT VapingBad said:

Montana measuring the internal resistance will give you a good idea (you will never measure is as low as the specs on home equipment, but under 0.035 ? is what I would expect for very high drain). This video explains how.

I don't know if I'm being really thick, or I didn't quite get what he said , but I'm still at a loss of how to measure how good my battery is , do you know of a vid that can SHOW me , I have a Digital multi meter , or is it something I can't do just with that , as something isn't quite right here with my batteries.


Andy


P.S  I don't know if my DMM is any good so here is a link to it  -  LINK

[VapingBad]

Montana Andy, that is th only video I can think of, so I will try and explain.

You need a resistance meter, a tank'o'meter & a mech mod for this method.

Make a 4 ? atty, a dripper with the thinnest resistance wire you have just attach to one terminal and adjust the length of wire until it measures 4 ? (R_x).

Put the tank'o'meter on the mod with the battery installed and fit the atty, fire it a few times and note the highest voltage (V_Out).

Loosen the atty and fire the mod to get the battery voltage (V_In).

The formula in the video:
R_I = (V_In - V_Out) X (R_x / V_Out)

EG:
Your atty is 4 ? (R_x)
The Voltage under load V_Out is 4.10 V and the battery voltage V_In is 4.15 V
R_I = (4.15 - 4.10) X (4 / 4.10) = 0.05 X 0.976 = 0.0488 ? or 48.8 m?

The resistance of your mod and the tank'o'meter will be part of the result, which is why you will never get to the figure in the spec, but it is still useful for comparing batteries and spotting a knackered one. Using a 2 ? atty my VTC4s measure between 34 & 39 m?. [/sub]

[Montana]

Not much I can do to test as I haven't even got a mech mod yet , that was one of the reasons for going for a VTC4 or VTC5 kind of battery now to see how they perform time wise in a day compared to what I have nowand I'm looking at a mech mod soon.Especially with a VTC4 as it has 2100mah and mine is supposed to have 2500mah , but that's questionable.


Andy

[VapingBad]

There are a few flash chargers that claim to measure it, but that's no help either. When you get a mech and sub-ohm you will notice the different vape quality between batteries.

The thing that often throws people with the mAh rating is it is usually measured at a lowish current and until the battery goes down to 2.5 V and nobody vapes like, especially running the battery that low.

Another good battery indicator is a genuine DNA as they do a lot of battery monitoring and reject batteries (the chip resets or restarts) when they start to struggle under load & not just by the voltage level. If you vape over 20 W you can see that it rejects 10 A batteries at a higher voltage than is does for 30 A ones. My ADV one is usually at 25 W and rejects VTC4s at 3.45 V so if one got rejected at 3.55 V it would indicate that it is starting to go down hill, if it rejected on at 3.9 V say its probably knackered.

[Montana]

Is the only difference between the VTC4 and the VTC5 the mah , with the 4's being 2100 and the 5's being 2600mah ???

As I could live with a battery that has less run time , but not less in another department.


Andy

[VapingBad]

Sept 29, 2014 10:22:07 GMT Montana said:

Is the only difference between the VTC4 and the VTC5 the mah , with the 4's being 2100 and the 5's being 2600mah ???

As I could live with a battery that has less run time , but not less in another department.


Andy

Yes in piratical terms, but to be precise no there is a small difference in internal resistance that you won't notice unless you are really driving them hard.