REAL continuous amp rating of samsung 25R's?

[RonaldStark]

I have thought for a while (due mostly to posts i've read and other 3rd party sources)
that the continuous discharge rating of 25R's were 20 amps. But on the site of both of
of the canadian vendors that carry decent priced batteries they rate them at 30 amps,
and now I notice that kidney puncher rates them at 25 amps. Either these batteries are widely
underrated or vendors are mis-advertising in way that could be potentially very dangerous to customers
who take them at their word.

I want to know in part for my own curiosity of how far I could push these batteries, and also so I can complain to these vendors for their reckless misinformation. I've had trouble finding anything other than vendor ratings, and user hearsay so any information would help

Thanks!

 

[guyakaguy]

Everything I've read, including the specs directly from Samsung say they're 20a continuous.

That's a specification sheet directly from Samsung. You can see it says 20 amp continuous discharge, but it also says 100 amp <1 second (pulse) discharge...

Are they capable of firing higher than 20a? Yes.

Samsung pulse tested them at 30 amps for 6 seconds. So for an *occasional* 30 amp discharge not exceeding 6s (on a known good and fully charged battery) you'd be fine.

Would I do it? No.



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[OBDave]

I'd believe the manufacturer over some vendor inflating specs to puff up sales any day, which is why I'll never call them anything but 20A cells.

 

[Ryedan]

I agree with guyakaguy. I've also seen a bunch of battery test graphs that also indicate to me they are 20A batteries. I have taken mine a bit over 20A once in a while and they do that just fine, but I wouldn't want to be doing it all the time or they would not last long. I also wouldn't want to have a mod autofire at 20A or higher so I do what I can to avoid that happening.

Keep in mind that CDR capability goes down as batteries age and deteriorate. I keep an eye on internal resistance as my batts age and recycle them when I feel they are not safe anymore for me.

There are a lot of false amp rating claims made by battery suppliers so I only buy manufacturer branded batts from suppliers that I know will not sell me counterfeits. Knowing my battery is authentic and what cell it actually is is really important to me.

 

[Angrygod50]

Mooch has his tests under the Charts thread and Jon at Liionwhosale.com has his tests posted on his site.
Both can be trusted.

 

[Jon@LiionWholesale]

Good question. The 25R is a bit of a weird one because the official spec sheet shows 20A, but for some customers they specify them as 25A and in some of their technical presentations they list them as 25A. They definitely outperform pretty much any 20A battery at 20A, so it seems that Samsung just rates them really conservatively and then when customers push them on it they raise it a bit probably with a bit lower life expectations.

 

[guyakaguy]

You have to remember too that the specs from Samsung for the 25Rs are on brand new batteries, not batteries that have been diminished (even slightly) by hundreds of drain and charge cycles.

My logic, and call me crazy, is that you should make every attempt to exceed your continuous amperage needs. If Steam Engine says you need 20a for a build/coil at used wattage then use at least a 25a CD battery, 15a build/coil a 20a CD battery, and so on.

I'm all about pushing limits, but some things need to be kept within the lines.

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[RonaldStark]

Thanks a lot for the input guys! I've sent a message to the Canadian vendor voicing my concern about their misleading amperage info, and I may even have to tone down my building habits a touch, I've been hovering around .21-.23 (tube mech) using fairly new 25r's, but I should give my self some margin for error until I can pick up some 25 to 30 amp LG's or something.

Thanks again!


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[Slurp812]

I mean how would a vendor know any better than the manufacturer?

 

[Angrygod50]

Thanks a lot for the input guys! I've sent a message to the Canadian vendor voicing my concern about their misleading amperage info, and I may even have to tone down my building habits a touch, I've been hovering around .21-.23 (tube mech) using fairly new 25r's, but I should give my self some margin for error until I can pick up some 25 to 30 amp LG's or something.

Thanks again!


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If you need more than 20 amps the Sony VTC4 is a true 30 amp battery