We have picked up another power bank from ADATA, this time a smaller in size and capacity and fancier looking compared to the other models we have tested so far. The 7000 mAh ADATA X7000 comes with mostly aluminum case where the battery is and a smaller plastic part where the electronics is housed, a slim, light and good looking power bank for sure. It comes equipped with dual USB charging ports and can charge two devices simultaneously with a maximum combined charging current of 2.4A. The supported input current for charging the battery inside the power bank is 2.0A, so it can be charged faster and can charge devices faster with up to 2.4A max current. Not to mention that the price of the power bank is quite attractive, making it an interesting choice for lower capacity model with faster charging options.

7000 mAh ADATA X7000 Power Bank Specifications:
– Capacity: 7000mAh (Rechargeable Li-Polymer battery)
– Colors: Titanium/ Blue/ Red
– Dimensions (L x W x H): 148.2 x 73.9 x 12.3mm / 5.8 x 2.9 x 0.48″
– Weight: 210g / 7.4oz
– Input: DC 5V/2A (Micro USB)
– Output: DC 5V/2.4A max (USB-A)
– Accessory: Micro USB cable, User Manual
– Warranty: 1 year


We have tested the 7000 mAh ADATA X7000 Power Bank with 1.0A constant discharge current as the more often used as well as with 2.4A as the maximum supported by the power bank. In both cases we are seeing that the electronics of the power bank manages to provide pretty stable and high (close to 5V) output and a very good capacity levels in terms of mAh and as a result in Wh as well. The voltage cure is not straight line like we’ve seen with previous models from ADATA, but a jagged one very similar to that we’ve seen in our 5000 mAh GP Portable Power Bank (FP05M) Test.

The performance of the 7000 mAh ADATA X7000 Power Bank in our tests:

– 5035 mAh at 1.0A load
– 4700 mAh at 2.4A load

– 25.19 Wh at 1.0A load
– 23.24 Wh at 2.0A load

Time for another quick deja-vu with our second attempt to test the 9V Maxell Zinc battery as the last time we have tried over 5 years ago the battery we received was past its expiration date and although we tested it we did not include the results in our test for comparison with other batteries. This time around the battery we got was a fresher one with expiration date 08-2020, so close to a year and a half left, so not going to skit the results this time around.


We started with a deja-vu this post as the usable capacity of the 9V Maxell Zinc battery we got this time was almost the same as with the expired battery we have tested a while ago. At 95 mAh capacity in our 0.05A constant current discharge test the results are not great, but it is to be expected from a Carbon Zinc battery anyway. So apparently even at the end of its shelf life you can expect similar performance to the one at the middle and maybe not that much different even with freshly produced battery of this model… if properly stored of course.

The performance of the 9V Maxell Zinc batteries in our tests:

– 95 mAh at 0.05A load

– 0.690 Wh at 0.05A load

We are not big fans of Carbon Zinc single use batteries as a cheaper alternative to alkaline batteries, but from time to time we still pick up some cells to test and reaffirm that we do not like them. Carbon Zinc batteries are designed to be used on devices with smaller power consumption and they do not offer as much capacity as their alkaline counterparts, but they do come cheap and are widely available in various stores. We are giving the 9V GP Powercell Heavy Duty another chance as we have tried to test one of these a couple of years ago, but it has arrived with at the end of its shelf life. The one we received this time is slightly fresher with 10-2019 expiration date, so this time with half a year left of its shelf life we have decided to include it in our test results.


As expected the 9V GP Powercell Heavy Duty Carbon Zinc battery did not do much better than our previous try, it has managed to give out just 32 mAh capacity at our constant discharge test with 0.05A. The previous test of expiring 9V GP Powercell Heavy Duty battery with just one month left was a bit better with 38 mAh, but this can be a result of different storage conditions. Anyway, we warn you once again to be careful when buying Carbon Zinc batteries to always check the expiration date and always go for fresh ones (never buy these online if the expiration date is not stated!), or better yet – go for alkaline batteries instead.

The performance of the 9V GP Powercell Heavy Duty Carbon Zinc batteries in our tests:

– 32 mAh at 0.05A load

– 0.234 Wh at 0.05A load

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