REVIEWS

iMuto Taurus X2 10,000 mAh power bank review

I bought this iMuto 10,000 mAh powerbank on a lightning deal from Amazon for £12.79. It normally seems to be available for around £14-16. It’s pretty good value and I’m recommending this one.

Buy this from Amazon UK - This link contains an amazon referral link which helps me to buy more power banks to test.

Video Review

In the box

The box that the powerbank comes in

The box is a generic cardboard box with a nice printed sleeve. It contains the power bank, a nice drawstring bag and a USB A to micro-USB cable. The power bank feels good in the hand, and has no obvious creaks or gaps in the case.

The contents of the box: powerbank, bag and micro USB cable.

Specifications

  • Dimensions: 97 x 65 x 30 mm
  • Weight: 242.3 g
  • Micro USB cable length: 60 cm
  • Input: 1 micro-USB
  • Output: 2 USB A - 5V up to 2.1A

The power bank lists its output as “2*USB 5V/2.1A (Max.)“. This seems to suggest a 2.1A maximum across both ports.

Power supply

Testing from a single USB port, the power bank delivers a steady 5V at 2.1A and turns itself off just over 2.5A.

The powerbank delivering 2.5A at 5V

Using both ports it’s possible to get slightly more current, but at 2.7A in total the supply voltage drops to 4.5V with the power bank switching off at 2.8A total.

Comfortably greater than the 2.1A maximum, so this is great performance.

Cable test

The cable is 60cm long, is nice and flexible and has the manufacturer logo on both ends which is a nice touch.

At 1 amp the voltage loss was 0.18v which is 3.6%. At 2.1 amps the loss was 0.36% or 7.3%. This isn’t amazing, but neither is it an awful result - this cable is perfectly adequate.

Capacity Test

Ignoring some issues with the USB load generating excessively noisy charts on my oscilloscope, the capacity test ran smoothly. With a purely resistive load the ‘noise’ was eliminated, so the cause was the load, not the power bank. This is why the discharge chart is a bit ‘wobbly’ for the first hour - I improved that with some additional cooling of the load. I’ll look to changing it for the next test. I re-recorded this section of the video using a load that does not suffer from this issue.

Current and Voltage nice and steady during the test.

The power bank delivered 29.8 watt/hours. The 10,000 mAh (10 Ah) cells in the power bank average 3.7V, giving us a maximum total power of 37 watt/hours (10 Ah * 3.7V). This means that the power bank reaches 80.6% of its claimed capacity, which allowing for loss from the conversion to 5V is quite reasonable.

The power bank cut off the power cleanly once it was discharged.

Display Accuracy

The remaining capacity the display of the power bank was reasonably accurate when measured throughout the discharge test. You can be confident that it’s a good indicator of remaining power.

The display readout vs. mAh delivered

Standby Power Loss

Seems fine. I’ve not measured the standby current as I’m not going to tear this one apart, but after 3 weeks of sitting idle it was still reporting 99% capacity.

Passthrough power

I didn’t test this in the video, but this power bank seems to do pass through power just fine. There is a brief interruption of a second or so when the supply is unplugged.