Rewrapping batteries - old news...

[Zutankhamun]

How hot do you guys let your battery get when the hairdryer is unleashed.
Sometimes I have to wave it around until my fingers get too hot so the wrap will shrink!

I have delicate fingers but is that too hot?

 

[Zutankhamun]

Also. How long should batteries last (in terms of lifetime)?
I mostly mtl with 1.2s on a mech. Not much stress but I will occasionally use the same batteries for a .4 build.
I don't really have that good an idea of how long the batteries last in terms of hours in the days.

They are all labelled so should I just give them a year or 2/3/4 years if they are still going?

Thanks

 

[sonicbomb]

I put the cell on wood floor against my foot to control the speed that the blower pushes it to a slow roll.
The common advice is 300 cycles or a year of continuous use. Of course there are many variables in terms of how hard they are used, and who can count charge cycles? If they take longer to charge than usual or they don't seem to hold a charge as long then it's time to replace. I tend to replace mine when they hit a year regardless of performance to be on the safe side. Remember the CDR will drop as the cell ages.

 

[Zutankhamun]

Thanks. Ok. 18650s are not a problem to replace but I worry about these 350s and 490s I have. Can't seem to find them as much.

So I don't need to worry about how hot these batteries get for the 20-30 seconds I have the bdryer on?
I know it's an external heat but still,
heat + batteries can't be good.

 

[Joergl100]

I rewrap all my batteries with transparent wraps...and new insulators too, and I use a normal lighter, no hot air blower.Works fine without burning my fingers and making the batteries hot! I hold them between my fingers while heating the wraps up! It is not too difficult. Need less than one minute for one battery...ok, i have got some practice!

Some of them:

 

[sonicbomb]

I wouldn't worry about the heat.
@Joergl100 How do you see the tears in the wraps if they are transparent?

 

[mongo74]

You guess? I...guess...my wrap's torn? *bzzt*

Blowdryer? Well...unless you're holding it 6" away on the same spot for 30 seconds...

 

[supertrunker]

If you try to cut corners, save time and use a blowtorch instead, then i find that if the battery goes cherry red, it's all over.



There are meters that measure the internal resistance of your battery , but they are not cheap. If you run a lot of batteries and measure them kinda regularly, then you can see a pattern of deterioration develop. It really does depend on how hard you push them as to how long they will last, but i agree that after about a year, especially if you sub-Ohm, call it a day and get some more.

T

 

[Joergl100]

My wraps don't cry...no tears...

If there were some, I would see it. The wraps are transparent, NOT invisible!

 

[BreSha6869]

Buy a heat gun. I paid $20-ish for a cheapie one and on the low setting, it shrinks the wrap in a few seconds. MUCH better results than any hair dryer I have tried.

I have clear wraps and I can check for tears by feel. Very easy to feel any holes or scrapes.

 

[bsidb]

I bought some clear wraps but cant find them, serious, bought some green to replace the lost clear

 

[BreSha6869]

I bought some clear wraps but cant find them, serious, bought some green to replace the lost clear

Did you buy the invisible ones by accident instead of the clear ones?

 

[Joergl100]

 

[Zutankhamun]

Admittedly clear ones are fine but any teeny scuffs or nicks would be easier to see on my green/blue wraps.

I'm paranoid about batteries and clear wraps just make me a little

(thats the closest emoji I could find for ever so slightly nervous)

 

[Joergl100]

I am not paranoid...only very, very painstakingly!