VTC4 versus 25R

[domesticextremist]

I recently swooped on some Samsung 25R for a competitive price from a reputable supplier.
These are 2500mAh nominal capacity, which seems to be verified by my charger.
I have been running them in my Pico at on a 1.8Ohm coil at 7.4W.
I notice that they seem to discharge noticeably faster (say 15%) than my 18month old Sony VTC4 which are only 2100 mAh.

Is there any obvious reason why this should be?
Are there such notable differences between manufacturers or is it possible that they have been on the shelf for a while and lost a bit of oomph?

[DiscoDes]

Different batteries will have different discharge curves. Some will drop quickly but hold a usable charge for longer, some you can hammer but only for a short time.
You really need to work out what useable vape time you get from yours.
The 25R's are a decent battery, I have some and they still perform okay. I mostly run single 18650 battery mods and have maybe 20 batteries of various ages. I just keep them topped up usually 6 - 8 batteries in rotation as I number them with a sharpie. Batteries have a finite lifespan of charge/discharge cycles some better than others. I buy a set of 4 new ones every 9 - 12 months and pension off the older ones.

So all in all what I'm saying is all batteries are not equal but take care of them and they should last longer than if you abuse them but in the end, all will go to battery heaven, some sooner than others.

[tim]

I'm led to believe that new cells require a few recharge cycles to "get up to speed". No idea if true, but thought I'd put it in.

[domesticextremist]

Yes I've read that too - the 25R has different chemistry to the VTC4 too, which might account for it.

I'm not saying the batteries are bad, just that I expected a slight increase in vaping time based on the rated capacity but seem to have got a reduction.

Perhaps they will improve over time...

[GunJack]

I'll second the several charges to get up to speed theory.....I use 25Rs exclusively in a similar fashion to you, and it does seem to take a few cycles to get the best out of them when new

[domesticextremist]

OK, I'll give them more time - once I've finished watching bigclivedotcom's videos (damn you DiscoDes )

[marksixysix]

As said, The Batteries should show improvement after a few charges.
I used to use the 25R a few years back, but then moved onto the 30Q as they have more mAh. A tad more expensive but I feel they are worth it.

[DiscoDes]

If one of your devices has a puff counter you could compare the 25r's against the VTC4's.

[beedee]

Aug 21, 2018 20:58:21 GMT tim said:

I'm led to believe that new cells require a few recharge cycles to "get up to speed". No idea if true, but thought I'd put it in.

I've found they start to improve with around 5 cycles. I know lots swear by the Samsungs and mine are OK, but I prefer the LG HG2 for battery life and good hits and the Sony VTC5 - but mostly use the latter in mechs. This is probably very subjective as I've never done any tests or anything...