That is an 18650 Lithium-ion (Li-ion) rechargeable battery. These are the workhorses of the modern portable world, found in everything from high-end flashlights and vape pens to laptop battery packs and even electric vehicles.
Here’s a breakdown of what those numbers and letters actually mean:
SKU: 440000434812
Categories: Batteries
That is an 18650 Lithium-ion (Li-ion) rechargeable battery. These are the workhorses of the modern portable world, found in everything from high-end flashlights and vape pens to laptop battery packs and even electric vehicles.
Here’s a breakdown of what those numbers and letters actually mean:
Anatomy of the Label
18650: This refers to the physical dimensions. It is 18mm in diameter and 65mm in length (the "0" indicates a cylindrical shape).
3.7V: This is the nominal (average) voltage. Fully charged, it will sit around 4.2V, and it should typically not be discharged below 2.5V to 3.0V.
ICR: This identifies the chemistry. "I" stands for Lithium-ion, "C" for Cobalt, and "R" for Round. Cobalt-based batteries are known for high energy density but require careful handling.
3350mAh: This is the capacity (milliampere-hours). It tells you how much "fuel" is in the tank. A 3350mAh rating is quite high for an 18650, suggesting it’s designed for long runtimes
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