Test/review of BLD 18650 3800mAh USB (Green)

[size=+3]BLD 18650 3800mAh USB (Green)[/size]



Official specifications:

• Product name: 18650 USB Rechargeable Li-ion Battery
• Model: 18650
• Type: Lithium Battery
• Appearance Capacity: 3800mAh/4200mAh
• Voltage: 3.7V
• Green Colour
• Weight: 34g
• Dimensions: 67 x 18 mm (length x body diameter)(without protected board)

A USB rechargeable LiIon battery, based on a 18500 cell with 3800mAh, no way















The capacity is lower than I expected and it cannot handle much current either, but at least the two tested batteries are equally bad.

















This is charging with a normal LiIon charger.



This is charging from the USB connector with a 5V supply, the two charge circuit is not perfectly matched in voltage, but easily withing the usual tolerances.



[size=+3]Conclusion[/size]

This is not exactly good batteries, they are rather bad with only 700mAh and only up to about 2A current. The USB charging works and do not need a cable.

They may be usable for some low power 18650 devices where USB charging is needed, but there is much better batteries with build in USB charger.



[size=+3]Notes and links[/size]

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 18650 and other batteries
Table with all tested LiIon batteries