Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. They are not supposed to be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.
Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.
If the battery has only one current rating number, or if it only says “max”, then I have to assume the battery is rated at that current level for any type of discharge, including continuous.
BAK is one of the large, established manufacturers in China and this cell performs well. This is important since cells from the major manufacturers are harder to find and are sometimes old stock, low grade, or even fake. Good performing alternatives like these are great to see.
This BAK performs a little better than the Molicel M50A (but the BAK runs a few degrees hotter) and about the same as the Samsung 50E3. It doesn’t perform as well as the Samsung 50S but that cell is very expensive and hard to find.
The datasheet rates this cell at 15A but notes that this affects cycle life. I recommend staying below 10A to reduce risk, increase overall cell life, and increase performance.
The two cells I tested delivered 4987mAh and 5020mAh. This is decent consistency for a cell from one of the large, established China factories. Both cells tested above their 4900mAh minimum capacity rating and essentially at their 5000mAh typical rating.
Two cells were donated for testing by 18650BatteryStore (18650 Battery Store – Lithium Ion Batteries, Chargers and Accessories). Thank you!
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To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum