Wednesday

What does "18650" printed on Li-ion battery stands for?

Now when you have your new LED flashlight, you start looking for the best li-ion batteries money can buy. Searching the internet will not reveal what 18650 stand for. Everything is so confusing, and all those numbers: 18650, 16340, 18500? Thousands of batteries to buy online- the question is: will they fit my new flashlight?
Is this the right battery for me? Will this type of li-ion battery work in my flashlight at all?...
Do you know what all those numbers actually mean?
I will start with 18650 Li-ion battery
Why manufacturers use number 18650? No, these numbers have nothing to do with battery chemistry.
These numbers, printed on li-ion rechargeable battery cells are so easy to forget if you don't know what their meaning is. Numbers, and abbreviations printed on rechargeable li-ion batteries are not that complicated after all. I will explain it in my next post.

Saturday

The best 18650 Battery in the World? - Panasonic 18650 3400mAh NCR18650B Li-ion

NCR18650B - Weird combination of letters, and numbers that altogether represent one of the most powerful lithium-ion rechargeable 18650 batteries in this present world.  The unbelievably amazing capacity of 3400mAh ( 3.4Ah ) sounds unreal today, but Panasonic specs datasheet is very real, and serious. Imagine millions of ions, jam-packed in one small 18mm by 65mm tube (approx. 1/2 size of permanent marker). But, if you have available: Li(NiMnCo)O2 - magic chemical formula, and the latest battery manufacturing technology then incredible things actually can happen.

NCR18650B Panasonic 18650 battery approximate weight is only 47 grams and that is roughly 1.66 ounces.