ENB (LingSword AA) Power Bank case

ENB (LingSword AA)

I purchased this product about a month ago and prepared this post since then. I was still in the stage of testing this product before I could put out this post, so it was a bit delayed.

Today, I'm going to talk about a rather interesting product from ENB, the ENB (LingSword AA) Power Bank case. Yes, you read it correctly. It is a power bank case. To use this case, you will need to supply your own protected/unprotected 18650 3.6V/3.7V Li-Battery. 

For my instance, I used two 18650 unprotected 2600mAh battery by Samsung SDI. Making it a 5200mAh power bank. You can supply a 18650 type battery that have a higher capacity and it will work accordingly too. You can even mix and match 18650 batteries with different capacity to achieve different total capacity.

Push from the bottom of the power bank case to open

I used two Samsung SDI (2600mAh) 18650 unprotected battery

I have put the power bank casing through its paces to see whether the power bank case performs as advertised. From the box, the case specification are as below.

• Input: 5V 1A, MAX 1.2A, Output: 5V 2.1A
• Charging Cut-off voltage: 4.2V, Discharging Cut-off voltage: 3V
• Efficiency: 93%
• Support one/two 3.6V or 3.7V 18650 Li-Battery (with/without protection board)
• Using Japan SeiKo Li-Battery protection IC
• Over discharging recovery
• Charging management protection
• MCU monitoring protection
• Battery reverse protection (In case the 18650 battery is inserted wrongly)
• Over current, over voltage, over discharging and short circuit protection

From my own testing, the battery case does indeed charge the 18650 battery to around 4.218V before the charging management protection kicks in to stop the charge. During discharging, the case also discharge the battery to approx. 3V. Therefore, I can conclude that the power bank case does perform as per specified. I measured the voltages using a Fluke multi-meter.

To show the current battery status, the 'energy-ring' also flashes the color of the remaining capacity

• Red, 0% - 33%
• Orange/Yellow, 33% - 66%
• Green, 66% - 100%

Overall, I'm pretty satisfied and happy with the performance of the battery case as it managed to charge my device with a full 2A current (even with just one 18650 battery in the case, which is just amazing). One 18650 2600mAh power bank with the ability to charge at 5V 2A is just incredible. The only gripe that I have is that it charges at a relatively slow rate at 1.2A max. During my own calculations, I only manage to see it charging at 1A and not 1.2A. 

Will make necessary edits in the future as I continue to use this product
As always, take care and I'll see you soon...