Determining max discharge rate.

[brig]

Hey all, I am still new to vaping and going on 2 weeks without cigs. Im trying to do all research possible to make sure any build I have is as safe as possible. How do I figure out out max discharge rate on a given battery? Is there a formula or is it only listed in the specs for that battery? Thanks.

 

[dr_rox]

Manufacturers supply that info. Needless to say, some are lax in reporting or releasing this info unless you are an OEM supplier/manufacturer. The consumer batteries that are protected should have datasheets online somewhere, and the limits of the protection circuit - charge Vmax and discharge Vmin and max current load - noted. The circuit determines battery output! NOT chemistry. They are throttled to operate safely. The flat tops intended for battery packs that are unprotected - datasheets are harder to find. Here's a reference I would bookmark and check. The numbers here can be used to discredit unquantified claims. All empirical data. Use charts online or your own math to figure out what the current load you need is, and then look at the charts.

http://www.lygte-info.dk/info/indexBatteriesAndChargers UK.html

 

[BoomStick]

Tell us what you plan to put them in and we can make recommendations of what batteries to use and guide you to trusted vendors. Some companies lie about specs and protected cells usually aren't suitable for our applications.

 

[brig]

The batteries are for a petit gros 18350 mod. I ended up getting a bunch of AW 18350 12a.

 

[Hermit]

I stay above 1 ohm with 18350s, cos they just don't have much runtime! Most of them would be 'safe' at that level, so I'd pick the one that stays highest for longest on the discharge graphs closest to the current I intend to run at.
There's some for the AW 12A here, but as noted, the result seems odd and more samples need to be tested...
http://www.dampfakkus.de/akkutest.php?id=556

You can put together your own comparison graph there too...
http://www.dampfakkus.de/akku_auswahl.php
Here's one for AW, Efest, and an EH that doesn't hold up well at 3A...
http://www.dampfakkus.de/akkuvergle...2=511&akku3=47&akku4=556&akku5=323&akku6=&a=3
... just to give you an idea of what we're looking for