Sony VTC4 / VTC5 chemistry?

[gorman]

From what I understand, after searching here and elsewhere (AkkuDB mainly, Battery University too), these two models use NMC chemistry (AkkuDB).

Battery University rates this chemistry as "most safe" (Types of Lithium-ion Batteries) but I wanted to understand if it's safe as IMR chemistry, less, more?

Anybody has other research to share? Note that I do not go seriously sub-ohm (most I went was 0.7) but I'd like to stay safe just the same (and their price is so good, compared to AW...).

 

[Baditude]

The Sony batteries are a hybrid IMR battery. Nickle-Manganese-Cobalt chemistry. They are as safe as the original IMR batteries (Li-Mn). Theoretically you can discharge these batteries down to 2.5 volts safely, although you shouldn't make a habit of this if you want your batteries to last longer.

"Hybrid batteries are a new type of "mixed chemistry" battery manufactured by Panasonic, Sony, and others. Hybid batteries use a Cobalt cathode like ICR batteries but have the same manganese and nickle makeup which IMR batteries have. This provides for higher drain capabilities while also having higher overall battery capacity (mAh).
Note that not all Panasonic NCR batteries are considered "high drain". The Panasonic NCR18650B 3400 mAh and NCR18650A 3100 mAh are best suited for low drain applications like a flashlight.

The downfall of hybrid batteries for e-cigarettes comes from how their capacity rating is calculated. Hybrid batteries are capable of a much lower minimum discharge voltage before causing physical damage to the battery. The battery is capable of being discharged to 2.5V whereas IMR/ICR batteries have a cutoff around 3.2V."

 

[Shootist]

The Sony batteries are a hybrid IMR battery. Nickle-Manganese-Cobalt chemistry. They are as safe as the original IMR batteries (Li-Mn). Theoretically you can discharge these batteries down to 2.5 ohms safely, although you shouldn't make a habit of this if you want the batteries to last.

You meant Volts didn't you?

 

[Baditude]

You meant Volts didn't you?

Yes I did. Error corrected.

 

[gorman]

Hi Baditude, not refuting what you wrote but... you're using italic, I think because you're quoting something. What is your quote from?

And thanks for your answer, it sounds reassuring.

 

[Baditude]

Hi Baditude, not refuting what you wrote but... you're using italic, I think because you're quoting something. What is your quote from?

And thanks for your answer, it sounds reassuring.

It is a quote from my blog Deeper Understanding of Mod Batteries - Part II, which I adapted from this article Batteries Explained and Safety - » The Original Electronic Cigarette Social Media Network

 

[gorman]

Nice! Thank you!