Meco 16340 1200mAh (Cyan)
Official specifications:
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Product name: MECO 3.7v 1200mAh CR123A/16340 Li-ion Battery
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Brand: MECO
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Capacity: 1200mAh
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Voltage: 3.7V
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Chemistry: Li-ion
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Rechargeable Times: Up to 500 times.
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Size: 34mm x 16.6mm (length x body diameter)
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Weight: 16g± 1g (1pc)
A 16340 cell from Meco, how good is this brand?
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/Meco%2016340%201200mAh%20(Cyan)-Capacity.png)
There is not much capacity in the cell, they two cells do not match and cannot deliver much current.
/Meco%2016340%201200mAh%20(Cyan)-CapacityTimeHours.png)
/Meco%2016340%201200mAh%20(Cyan)-CapacityTime.png)
/Meco%2016340%201200mAh%20(Cyan)-Energy.png)
/Meco%2016340%201200mAh%20(Cyan)-PowerLoadTime.png)
A cell cannot power a 3 Watt load.
/Meco%2016340%201200mAh%20(Cyan)-TripCurrent.png)
/Meco%2016340%201200mAh%20(Cyan)-Charge.png)

Conclusion
This cell is a waste of money.
Notes and links
The batteries was supplied by Banggood for review.
How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to other LiIon batteries
Table with all tested LiIon batteries