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4.86 out of 5
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  • 05/10/2023

    Excellent power bank, recharges real fast with PD 9V, 2A (18W) on USB-C. Shows % and fast PD charging. No sharp edges like with aluminium case.

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  • VIP2

    Excelent! I recomand this product. The waiting time was long but it deserved

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  • 28/11/2023

    Overall this is a decent power bank, and at the sale price of 17.99 a fairly good deal. However, my test show that it has lower energy output as compared to my 5 year old OLcell power bank. Test Conditions Unit was connected to a volts/amps/power/watt meter. Attached to the power meter was a constant current load set to 0.5 Amps (500 mA). It was then allowed to run until the power bank shut itself off. Ratings for KUULAA = Unit is rated for 10Ah (10,000 mAh) at the lithium cell nominal voltage of 3.7 volts. Nameplate also state 37 Wh (Watt hours) which is consistent with the above (Volts x Amps = watts). Results for KUULAA I charged the unit 2 hours after it read 99% (the highest reading for the 2 digit display). I then left the unit sit for 12 hours unconnected to power or a load. I then connected it as described. On the second test (see note below) the unit output tested out at 5.53 Ah (5530 mAh) at 5 volts = 27.65 Wh. The efficiency of the unit, assuming the Lithium cell as actually rated for 37Wh = 27.65/37 x 100 = 74% *Note - When the unit arrived it showed as 99% charged. I charged it for about 2 hours and then let it sit for 12 hours. It measured as only 2.65 Ah. It would seem like the lithium cell was in some strange storage state so I repeated the test. Results for OLcell This unit is 5 years old. However I do not use it often so it probably has under 80 complete charge cycles. So I would expect it would not meet it's published spec of 10Ah at 3.7V = 37 Wh. I charged the unit till 2 hours after it read 4 LEDs (the highest reading for the 4 LED display). I then let the unit sit for 12 hours unconnected to power or a load. I then connected it as described. Results of OLcell 6.9Ah x 5 V = 34.5Wh. 34.5Ah/37Ah x100 = 93% efficiency assuming Lithium cell is actually 37Ah Conclusion: The KUULAA unit has less capacity (at the USB outlet) than the older power bank. This could be due to lower efficiency of the voltage converter, or lower Lithium.

    Comments (2)
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  • 20/09/2023

    This is really a well made product. I needed something that could give me 9 volts to charge my camera when out and about. This does the job perfectly. I learnt a while ago that a lot of stuff marked PD does not necessarily mean that it will output more than 5 volts. I am doing the review because I think that it's a good product not for the points. The points are just a stunt as they seem to have no real value.

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  • 16/09/2023

    this really is an excellent item, very quick to recharge and Im able to charge my iPhone and iPad leaving plenty of charge for another day

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  • 29/07/2023

    Great for Cat 5 testing

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  • 29/05/2023

    Thank you

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