Good cheap batts for LT v1

[Deleted]

The 18650 actually defines the size of the battery, 18mm diameter, 65mm tall, the 0 indicates it's round . But the reality is that they vary a little bit. i have seen several reports of protected batteries being that little bit taller and too tall to fit in a mod.

Nearly, but not quite. The battery can only provide the voltage it has, and this varies depending on the charge state of the battery, i.e. how full it is. With the batteries we use they stay at about 3.7 volts for most of their charge state. It's the current that some protection circuits can't handle.

In an electronic mod there is a circuit that boosts this voltage, up to the 6V that the mod reports as it's maximum voltage. When the mod says it is variable voltage it's lying > what they do is switch the voltage on and off quickly ( this is certainly true for the Vamo and I think it is for most of them but I can't say for sure as I've not got them all ) so that it is almost like providing a variable voltage ( the mods like the vamo use digital control and it is far easier to just switch things on and off with digital electronics than to really vary the voltage ) The time switched on compared to the time switched off is varied to alter the output, so for 6 volts the output in on all the time and never off, for 3V it may be on for 50% and off for 50%

Here's an image of what the Vamo outputs at one setting:


It's called a square wave, when the line is low there is no output, when the line is high it's outputting 6v (roughly) it does this 33 times / second.

Hope that makes sense

[2risky]

Great info, thanks everyone.
For me short circuit protection is most important, even if the mod has it fitted already.
I have been known to inadvertently launch a pint of tea across the occasional room, so if there's a battery lying around..

Jan 10, 2013 17:50:56 GMT Gordy said:

cheapest battery is the AW... it will save you money in the long run

I'm sure that's right Gordy, but the only money I ever seem to have is the short run kind.

[djs]

cornersruns - good work! Thanks for your help.

I'm just worried that one day I'll buy a battery that fits in nothing.

[2risky]

www.ebay.co.uk/itm/2x-Protected-Panasonic-2900mAh-NCR18650-3-7v-Li-Ion-18650-protective-case-/290837533652?pt=UK_ConsumerElectronics_Batteries_SM&hash=item43b74493d4

Got these panasonic 2900s off Torchy, very tight squeeze for length and the threads of the LTv1 end cap just about catch. Lasts for ages though.

Wish there was an extender. Anyone got a CNC lathe they can lend me ?

[mybad]

Jan 17, 2013 13:54:27 GMT 2risky said:

www.ebay.co.uk/itm/2x-Protected-Panasonic-2900mAh-NCR18650-3-7v-Li-Ion-18650-protective-case-/290837533652?pt=UK_ConsumerElectronics_Batteries_SM&hash=item43b74493d4

Got these panasonic 2900s off Torchy, very tight squeeze for length and the threads of the LTv1 end cap just about catch. Lasts for ages though.

Wish there was an extender. Anyone got a CNC lathe they can lend me ?

Thats strange, I have the same batteries in the LT V1 and the bottom cap screws flush up to the mod body just nicely.

Mybad.

[2risky]

Perhaps a slightly different model. If i was brave I might remove the raised nipple/connector on the top, only I'm not sure what's beneath and I don't want to ruin the battery. Still, it works, so it's fine.

[Karma]

Jan 17, 2013 22:35:45 GMT 2risky said:

Perhaps a slightly different model. If i was brave I might remove the raised nipple/connector on the top, only I'm not sure what's beneath and I don't want to ruin the battery. Still, it works, so it's fine.

please don't remove the connector on the top of your battery, really not a good idea

[dave]

I've got a LT V1 and it definitely won't take anything longer than a standard 65mm long battery, which rules out any of the protected batteries. You absolutely don't need protected batteries in these types of devices though as they provide short circuit and over discharge protection anyway. In any case protected batteries may not be able to provide the current (amps) that a VV device needs to run - some of them do, some of them don't.

[2risky]

These ones do, they're pretty good, just a bit too long.
And karma, I did say I wouldn't remove the end. I'll prolly just bash the end a bit flatter with a hammer. That was a joke.
Thanks for your concern though.