Battery for USB pass through?

[breno]

I though you did not need a battery with a passthrough?
Thats the whole point of them isn't it???
510 Spare Battery for Passthrough - 510 - Manual - Eastmall International Co.,Ltd

[ApOsTle51]

it's a two fold safety feature originaly devised by janty with the Kissbox.

Firstly : Your standard USB port ( more so on older PC's ) will only supply 500mA of power to a device before it needs to negotiate with the host and request a higher output. an ecig passthrough currently cannot interface with your PC to request that power increase.

Your standard ecig can draw up to 1500mA of power. This is why if you want to run a passthrough without a battery you will see most people use a mains powered USB hub which can deliver a higher ( 1500mA ) amperage without negotiation.

To overcome this , a battery is placed in-line so your not drawing power from the USB port but rather from the battery. The passthrough just charges the battery as it has a charge protection circuit within it from the USB.

All this is to protect your PC's USB ports from a power overload.

Secondly : Drawing power from the in-line battery ( its a 10440 battery btw ) keeps the voltage at 3.7 volt which is what atomizers are designed to run at rather than 5 volts that a USB port would supply unregulated.

Not all passthroughs on the market implicate the in-line battery, and there are posts on this very forum about Damage caused to motherboards and such because of this. Granted , there are many that use them with no issues but it is a risk , hence the reason for a mains powered hub.


ApO.

[breno]

it's a two fold safety feature originaly devised by janty with the Kissbox.

Firstly : Your standard USB port ( more so on older PC's ) will only supply 500mA of power to a device before it needs to negotiate with the host and request a higher output. an ecig passthrough currently cannot interface with your PC to request that power increase.

Your standard ecig can draw up to 1500mA of power. This is why if you want to run a passthrough without a battery you will see most people use a mains powered USB hub which can deliver a higher ( 1500mA ) amperage without negotiation.

To overcome this , a battery is placed in-line so your not drawing power from the USB port but rather from the battery. The passthrough just charges the battery as it has a charge protection circuit within it from the USB.

All this is to protect your PC's USB ports from a power overload.

Secondly : Drawing power from the in-line battery ( its a 10440 battery btw ) keeps the voltage at 3.7 volt which is what atomizers are designed to run at rather than 5 volts that a USB port would supply unregulated.

Not all passthroughs on the market implicate the in-line battery, and there are posts on this very forum about Damage caused to motherboards and such because of this. Granted , there are many that use them with no issues but it is a risk , hence the reason for a mains powered hub.


ApO.

Thanks for that. It all seems a bit of a 'botched job' to me, a fudge, the whole point of using USB power is IMO to avoid batteries altogeather so to find I need a battery too is a major pain in the butt.
How long would such a battery last? Any idea?

You seem to indicate that the passthrough will not work without a battery, is that the case, seems that way.

Seems to me there must be a switch so the charger is disconnected when you inhale otherwise you would get 5V?

I always though it was weird to have a USB power anyway the logical thing is a main adaptor, crazy idea, do I have to switch my computer on to smoke?

[ApOsTle51]

Thanks for that. It all seems a bit of a 'botched job' to me, a fudge, the whole point of using USB power is IMO to avoid batteries altogeather so to find I need a battery too is a major pain in the butt.
How long would such a battery last? Any idea?

You seem to indicate that the passthrough will not work without a battery, is that the case, seems that way.

Seems to me there must be a switch so the charger is disconnected when you inhale otherwise you would get 5V?

I always though it was weird to have a USB power anyway the logical thing is a main adaptor, crazy idea, do I have to switch my computer on to smoke?

I have no idea how long the battery life time would be on a passthrough Im afraid , I dont use one

A passthrough that incorporates a battery will not work without the battery installed.

there is no switch that disconnects the battery charger when you inhale, your just using the battery to power the ecig , the USB in turn charges the battery.
Passthroughs that don't use a battery run at 5V unless they carry a resistor circuit to reduce the voltage to 3.7v.

edit : oh , I see where you got that idea from :

Your standard ecig can draw up to 1500mA of power. This is why if you want to run a passthrough without a battery you will see most people use a mains powered USB hub which can deliver a higher ( 1500mA ) amperage without negotiation

The bolded text should really have read " run a passthrough that doesnt incorporate a battery"

If you use a mains USB hub then no yo dont need to plug it into your PC.
You can use USB wall chargers, but must make sure it has a high enough mA output ( 1000mA min. )

[breno]

I am just not sure how you can recieve power from the battery at 3.7V when it is being charged at 5V?
I mean if the top of the battery is 5V then you would receive 5V from the battery when you drew power from it.
The only way I can see you getting less than 5V is if you have a suitable resistor before the battery to drop the voltage and take the supply from there.

[ApOsTle51]

no , the charging circuit in the passthrough reduces 5volts from the USB to 4.2volts to charge the battery. putting charge at any level without any electronic protection to an unproteced battery will cause the battery to catastrophically fail.

The maximun voltage from a passthrough with a battery to the atomizer is 4.2 volt . all ecig batterys rated at 3.7volt are actually around 4.2 volt when fresh off charge then quickly drop off from there. If using unproteced battery as the 10440 is , if the charge within it goes below 2.7 volt then there is a possibility that the battery will not accept further charge.

As the protection is not in the battery to avoid this happening the protection circuit is normally fitted to the device to which it powers. I do not know if a passthrough with a battery has this low voltage cut-off protection but i would find it unlikely as the battery would be constantly accepting a charge as long as the PT is connected to the USB with the overcharge protection circuit in the PT shutting off the charge cycle to the battery when it reached 4.2volt and switching the charging cycle back on at a pre-determined voltage ( 4.1 volt for e.g. ) so in theory the battery should never drop to the minimum voltage.

Lithium batteries are different chemistry to say Ni-Mh . Ni-Mh will hold the same voltage ( 1.5v) virtually until the charge has been expelled. Lithium Ion cells drop voltage as the charge is expelled.

[SwanVesta]

I have been informed by TECC (despite the fact I use my passthru daily) that the rechargeable battery should not need replacing "for about 6 months to a year"

HTH

[breno]

I have been informed by TECC (despite the fact I use my passthru daily) that the rechargeable battery should not need replacing "for about 6 months to a year"

HTH

How long has your battery lasted?

[SwanVesta]

Interesting you should ask......


8 weeks ago I upgraded to a new Titan 510 and purchased a new usb passthrough with my new kit and caboodle asked TECC if I should replace the battery - hence reply I quoted earlier in thread. Anyway, I decided to order another USB passthrough as I use it so much and now I am today using my new USB PT I know for sure it has weakened considerably! Its like a whole new experience again!

So now I wonder is it the passthrough itself thats knackered or does the rechargable battery actually need replacing?

I am going to do a thread asking when I figure out where I should post such a question

Thanks

[breno]

Well as far as I am concerned I don't see how your pass through itself can be knackered, I mean basically it is a couple of wires and a bit of circuitary to control the charging.
Such circuitary in my opinion does not 'wear out', it is mainly solid state stuff and a few connections, basicaly such stuff either works 100% or it doesn't, a bit like a TV or a computer perhaps, they don't 'fade' over time.
Batteries on the other hand are well known for fading we know that from flash light batteries, OK they are not usually rechargeable but car batteries are and they also fade over time, (the plates corrode or whatever).
So to me it is certain that your battery is becoming less efficient as I would definately expect in fact I would be astonished it it did not!

Manufacturers and suppliers opinions of their products seem to be rather optimistic!!
(note I avoid calling them down right liars here ), I mean you get similar optimistic claims on how much eliquid you will use etc...
So I would say you should just have ordered another battery as I expect your passthrough itself if perfectly fine, apart from the battery.
I mean what you have done effiective is bought a new car because your car battery was fading!! (well that's exaggerating it a bit!)