The Anker PowerCore Slim 1000 is a rather simple, basic charging device. We appreciate its approachable price and high level of portability. However, we found it to hover only slightly above average regarding battery capacity and recharge time. Moreover, there are no bells and whistles included with this model. It's not our favorite charger of the group by any means, but it will do what it's designed for: recharge your phone or another device in a pinch.Editor's Note: This product review was updated on March 7, 2022, to offer more insight comparing chargers.
Anker PowerCore Slim 10000 Review
Pros: Inexpensive, small and portable design
Cons: Limited additional features
Compare to Similar Products
Anker PowerCore Slim 10000
$21.99 at Amazon
$29.99 at Amazon
|$20.00 List||$22 List|
$21.99 at Amazon
$13.89 at Amazon
|Pros||Inexpensive, small and portable design||Inexpensive, super easy to carry in a pocket, short recharge time||Lightweight and portable design, good battery capacity, inexpensive||Great value, USB-C/microUSB charging input, dual outputs||Cheap, recharges relatively quickly|
|Cons||Limited additional features||No integrated cables, can only charge a single device at a time||No integrated cables||Takes a long time to recharge, not the highest power output||Mediocre capacity, not terribly portable or convenient|
|Bottom Line||This basic option is a great choice for a highly portable charger without any fluff or extra features||One of our overall favorites, this portable charger is simple, high-performing, and affordable||If you're seeking a battery bank with a larger capacity, then this is one of our favorites||If you are searching for a great value, then we strongly recommend checking out this set of power packs||This charged our devices fast and for an incredible price|
|Rating Categories||Anker PowerCore Sli...||Anker PowerCore 5000||INIU Portable Charg...||2-Pack Miady 10000||Aibocn Power Bank 1...|
|Charging Efficiency (30%)|
|Added Convenience (20%)|
|Recharge Time (10%)|
|Specs||Anker PowerCore Sli...||Anker PowerCore 5000||INIU Portable Charg...||2-Pack Miady 10000||Aibocn Power Bank 1...|
|Claimed Capacity||10,000 mAh||5,000 mAh||10,000 mAh||10,000 mAh||10,000 mAh|
|Dimensions||5.82" x 2.63" x 0.62"||4.20" x 1.30"||5.19" x 2.75" x 0.60"||5.49" x 2.64" x 0.63"||5.40" x 2.40" x 0.83"|
|Measured Weight||7.13 oz||4.71 oz||6.88 oz||7.69 oz||8.54 oz|
|Measured Charge Time||315 min.||150 min.||300 min.||405 min.||240 min.|
|Output 1||5V / 2.4A||5V / 2A||DC5V / 3A(Max)||5V / 2.1A||5V / 2.1A|
|Output 2||N/A||N/A||DC5V / 3A(Max)||5V / 2.1A||5V / 1A|
|Output 3||N/A||N/A||DC5V / 3A(Max)||N/A||N/A|
|Input||5V / 2A||5V / 2A||USB-C:
5V / 3A
|Micro USB/USB-C: 5V/2A||1 A|
Our Analysis and Test Results
Unfortunately, this portable battery pack isn't compatible with Qualcomm Quick Charge, so it might not be the best option if you are looking for fast charging capabilities on devices like a Samsung Galaxy phone.
We started off by rating and ranking how portable the Anker PowerCore Slim 10000 is compared to the other battery packs we tested. We looked at the dimensions and weight of each battery and how comfortable they are to carry around in a front or back pocket in a typical pair of pants. This charger — as the name suggests — is on the slim side, earning it a solid score in this set of tests.
This charger is on the lighter side, tipping the scales at just under half a pound — 7.13 ounces by our measurement, to be exact.
As mentioned above, this power bank is on the slimmer side at only 0.62 inches thick. It also has a fairly small footprint of 5.82 inches by 2.63 inches. This means that it is fairly comfortable to carry around in either a front or back pocket — usually less noticeable than a typical smartphone.
Our next set of tests looked at each battery pack's charging capacity and efficiency. We based scores for this metric on the number of times each battery could charge a device, namely a Samsung S8, and how many milliamps we could get out of each charger when using a dummy load set for different discharge rates, as measured by a digital multimeter. The Anker PowerSlim 10000 did decently well, earning a slightly above average score.
This battery did well in our device tests, slightly exceeding the manufacturer's claims. This battery charged our S8 2.49 times, with the manufacturer claiming that it could charge an iPhone 12 2.25 times, a Galaxy S20 1.6 times, and an iPad Mini 5 1.2 charges. This would correspond to charging an S8 2.11 times based on the different battery sizes.
For the simulated loads, we started with a discharge rate of 2.4 amps. At this rate, it lasted for a little over 2.5 hours and output 6,269 milliamp-hours, or about 63% of the claimed 10,000 mAh capacity.
Next, we scored and compared all the different extra features that help make these products more convenient to use. We took into account how many devices you can charge at once, if there is a built-in flashlight, and if there are integrated cables or a recharging plug. Because the Anker PowerSlim 10000 is fairly simple in design, it scored below average in this metric.
This power bank only comes with a single output force, so you are limited to charging a single device at a time. It also doesn't have any integrated features, like a flashlight, cables, or wall plug, which contributes to its lackluster score.
For our final metric, we timed how long it took each portable battery to recharge and based our scores on that. This battery charged a little faster than average, earning another decent score.
The PowerSlim 10000 took around 5 hours and 15 minutes to completely recharge in our tests, with the average being closer to 6 hours.
Should You Buy the Anker PowerCore Slim 10000?
While this portable charger is far from our favorite or the best you can get, it's still a fairly low-cost option for charging a single device. It's slim, light, and portable, without any extra features. We wouldn't recommend this as your primary portable charger, but it's a decent option to throw in a backpack or purse if you want to be sure you aren't ever caught with a dead smartphone — just don't forget to toss in some extra cables as well.
What Other Portable Chargers Should You Consider?
If you want a charger that comes with cables included, the Q Slim Power Bank Pro 10000 mAh comes with three integrated cables, so you're never left without. If you need to charge larger devices on the go, like a laptop, check out the Anker PowerCore+ 26800 PD.
— David Wise and Austin Palmer
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