Anker PowerCore Slim 10000 Review: A Day of Backup?
Anker's thin battery pack with one USB-C port that charges both ways. The everyday backup for a phone that dies before the day is over.
Yes, for anyone whose phone runs low by evening. The listing gives about two full charges for an iPhone 15 from a pack about the size of a phone [1]. Skip it for someone who needs to charge a laptop; this one is sized for phones and small tablets.
By Andrew Pataleta, GiftX founder · Updated October 28, 2026 · Sources
Specs at a glance
| Capacity | 10,000mAh [1] |
| Phone charges | About 2 for iPhone 15, 1.93 for Galaxy S23 [1] |
| Ports | One USB-C, one USB-A [1] |
| USB-C | Input and output [1] |
| Size | 5.99 x 2.81 x 0.61 inches [1] |
| Weight | 8.6 oz [1] |
| In the box | USB-C to USB-C cable, guide [1] |
| Warranty | 18 months [1] |
Pros and cons
For the phone at low battery by dinner
Phones die at the worst moments: a delayed flight, a long concert, a day of holiday shopping with the map open. A small battery pack is the stuffer that ends those moments.
Anker is the name most people already see on chargers and cables, so this is a safe gift for someone who is picky about electronics.
Capacity, ports and the cable
The listing gives a 10,000mAh capacity, enough for about two charges of an iPhone 15, 1.93 for a Galaxy S23 and 1.23 for an iPad mini 6 [1]. That covers a full day away from an outlet for most people [1].
The USB-C port works both ways, so the same port charges the pack and the phone, and there is also a USB-A port [1]. A USB-C to USB-C cable comes in the box, along with an 18-month warranty [1].
Weight, size and what it cannot do
Slim is not tiny. The pack measures about 5.99 by 2.81 by 0.61 inches and weighs about as much as a phone at 8.6 ounces [1]. It fits a jacket pocket or a bag, not a jeans pocket next to the phone.
It is also not a laptop charger. It is built for phones, earbuds and small tablets, and there is no wall plug in the box, so they will use a phone charger to refill it [1].
A phone kit for the stocking
Charge it before wrapping so it works on Christmas morning. A dead power bank is a let-down on day one.
From this guide, pair it with the PopSockets PopGrip for a teen, or with the OCOOPA Rechargeable Hand Warmers for someone who spends winter days outside and needs both warm hands and a working phone.
FAQ
How many times will the Anker PowerCore Slim charge a phone?
The listing gives about two charges for an iPhone 15, 1.93 for a Galaxy S23 and 1.23 for an iPad mini 6 [1]. Real results vary with the phone and the cable, but a full day of backup is a fair expectation for most phones. Older phones with smaller batteries get more refills [1]
Can the Anker PowerCore Slim charge a laptop?
It is not built for that. The listing sizes it for phones and small tablets, with a USB-C port that charges both ways and a USB-A port [1]. Some small USB-C laptops may take a trickle of power, but a laptop needs a bigger, faster pack. For phones, this one is the right size [1]
Does the Anker power bank come with a charger?
It comes with a USB-C to USB-C cable and a welcome guide, according to the listing, but no wall plug [1]. Any USB-C phone charger refills it. Charge it fully before giving it, so it is ready the first day, and remind them to top it up after each trip [1]
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Sources and how we checked
- Amazon.com listing for the Anker PowerCore Slim 10000 Power Bank
Source check: Amazon prices and contents above were checked on October 28, 2026. We did not test these products hands-on. Picks are based on manufacturer specs, Amazon listings and the reasons people actually give these gifts.
As an Amazon Associate, GiftX earns from qualifying purchases. Prices and availability change, so check Amazon for the current price.