SMOK XPro M65 drops to 15 Watts on its own issue

[dickyg]

Feb 23, 2015 18:06:26 GMT moodyb said:

Feb 23, 2015 17:52:57 GMT dickyg said:

Mine is messing around and dropping wattage when it feels like it. I bought a Samsung 25 battery alongside the mod, its under a month old. To say I'm disappointed is an understatement. I work ten hour shifts, majority of the time away from charging source, this mod/battery is not fit for purpose as it isn't long before I get the weak battery message and it refuses to work. I then manage to get it on charge and it still states it has 50-60% charge in it.

Have you tried resetting the device to see if it makes a difference?

I've been lucky and only get the weak battery message when it gets down to the last 1-2 rows of pixels on the bottom of the battery graphic on the display, and it then shows 25-30% when I put in on to charge.

I'll test the battery out on my Xtar VP1 charger to see what the battery voltage is really at next time.

Have given it a go tonight, but currently using it as a pass through. Will see if it makes any difference tomorrow when out and about. Fingers crossed it fixes it.

[Ripshod]

Feb 23, 2015 19:57:57 GMT dickyg said:

Have given it a go tonight, but currently using it as a pass through. Will see if it makes any difference tomorrow when out and about. Fingers crossed it fixes it.

Keep it warm I say, else be bitterly disappointed.

[dickyg]

Not left the house, reset done, kept warm. Fully charged at 07.30, now power reduced to 10 watts and weak battery error messages. 4.5 hours out of the battery, not good.

[milomonkey]

So I have discussed the matter with myepack guys and they are happy to refund the device. However now I need to get a new mod and I would rather avoid the XPro Box mods from SMOK just to be sure.

[jmw2309]

Feb 24, 2015 22:23:51 GMT milomonkey said:

So I have discussed the matter with myepack guys and they are happy to refund the device. However now I need to get a new mod and I would rather avoid the XPro Box mods from SMOK just to be sure.

Is this as a one off refund or a blanket offer to all that have purchased from them? The wattage thing is actually getting annoying now. Not so bad with the subtank @18w but very annoying when it drops the atlantis out of play almost all together.

[dickyg]

Also interested to know if the refund offer is for all purchased. Not fit for purpose in my eyes.

[jmw2309]

Maybe myepack could confirm?

[dickyg]

Feb 25, 2015 14:13:24 GMT jmw2309 said:

Maybe myepack could confirm?

Have you contacted them directly or just awaiting a reply here?

[jmw2309]

Have emailed ash too

[dickyg]

I just banged in a message via the contact us on the website. Will let you know if I get any response.

[Ripshod]

I've just tried a Samsung 25R in mine and I get the watt drop problem, a HE2 is worse, a HE4 slightly better. Gone back to my VTC5 and all's fine. Got a VTC4 on charge, will try that when it's done.

Battery issue anyone? 

I think I'm onto something here.

Sony VTC5 IR = 13 milliohms (0.013 ohms)
Samsung 25R IR = 28 milliohms (0.028 ohms)
LG HE2 IR = 20.5 milliohms (0.021 ohms)
LG HE4 IR = 20 milliohms (0.020 ohms)

What these numbers represent is the internal resistance of the batteries. The higher the number, the higher the volts sag under load. Probably no real help but it explains the problems and why I have none.

[dickyg]

The mod is still saying the battery has 60 odd % when mine starts playing up. In my limited knowledge I think it points towards the mod being to issue.

[Ripshod]

I'm not denying the mod IS over-sensitive to sag, but the above post is the reason mine is fine.

I'll use the HE2 as an example. Ignoring the various volt drops through the mod.

At 4 volts vaping at 40 watts I'm drawing ~10Amps from the battery. At 10 amps the 0.021 ohms is causing a drop of 0.21 Volts at the battery terminals. The mod is seeing this and thinking 'weak/bad/poor battery'!

You got to admit a drop of 0.2 turns the 4.0 into 3.8 Volts, and that's what the mod is seeing. iirc there have been similar problems with the provari's. No-one kicked off, they just got better batteries (or is that just down to the 'provari' name?).


disclaimer: I'm ignoring the commonly understood overheads as I'm only considering the battery side of the electronics.

[dickyg]

You could well be on to something. Designing a mod which can only be used with a specific unobtainable battery is fairly stupid though!

[Ripshod]

VTC3/4 have similar IR to the 5.

If only everyone with problems had access to a VTC3/4 for testing. But I've seen it, it happens.