Valve lists a 45W USB-C power supply for the Steam Deck, so the power bank that keeps a Deck going in play is one whose USB-C output can match that 45W. The other thing that matters on a handheld is the cable: a lead dangling across the grips gets in the way. These three picks are a balanced all-rounder, a value pick and a big-capacity pack for the longest sessions.
Top picks
1. UGREEN Nexode Power Bank 20000mAh 145W - Best Overall
SPP Score: 9.0 / 10 - 20000mAh with a built-in USB-C cable and 145W of headroom. Our all-round pick.
Capability 9.8/10 - Versatility 7.1/10 - Build 8.5/10 - Value 8.9/10 - Fit 9.8/10
Fit for this guide: A Deck session wants the cable already attached, and this one gives more than the 45W of Valve's own charger.
Every pick here is scored out of 10: four marks rate the product and are the same in every guide, and the fifth rates its fit for this guide - how we test and score.
UGREEN's listing title is "Nexode 145W 20000mAh Power Bank 3-Port Built-in USB C Cable", and that built-in cable is why it suits the Deck: the lead travels with the pack. UGREEN says it gives "up to 100W via USB-C and 145W total across all ports", so its USB-C alone clears the Deck's 45W charger, and a phone or a second handheld can charge from another port on the same trip.
Pros
- ✓ Three ports, so a phone can charge alongside the Deck
Cons
- ✗ The built-in cable fixes the port layout, so you're tied to UGREEN's arrangement
- ✗ With only the Deck plugged in, most of the 145W sits unused, since Valve's own charger is 45W
Who it's for: Steam Deck owners who want one pack that charges the Deck at full speed with the cable already attached.
Who it's not for: Anyone who never charges anything but the Deck.
2. INIU Power Bank 20000mAh 65W - Best Budget
SPP Score: 8.8 / 10 - 20000mAh at 65W, above the 45W of Valve's own charger. Our value pick.
Capability 9.8/10 - Versatility 7.6/10 - Build 8.9/10 - Value 8.9/10 - Fit 8.5/10
Fit for this guide: A 20000mAh pack at 65W for the Deck, though a laptop alongside it wants more output.
INIU sells this as a "Laptop Power Bank" at 20000mAh and 65W. On leads, our fast-charging USB-C cable guide covers what to look for.
Pros
- ✓ 65W in its listing title, above the 45W of Valve's charger
- ✓ INIU's listing title calls it the "Smallest 20000mAh 65W"
Cons
- ✗ Its listing doesn't say how the 65W splits across ports, so check its USB-C figure against the Deck's 45W before you buy
- ✗ At 65W it falls short of a laptop whose own charger is rated higher
Who it's for: Players who want 20000mAh at 65W from a bank INIU sells for laptops.
Who it's not for: Anyone who wants one bank that also keeps up with a large laptop.
3. Anker Power Bank 25000mAh Travel Essential (165W Triple USB-C) - Best Premium
SPP Score: 8.9 / 10 - 25000mAh with two built-in USB-C cables, a USB-C port and a USB-A port. Our pick for maximum capability.
Capability 9.8/10 - Versatility 8.5/10 - Build 9.4/10 - Value 8.9/10 - Fit 8.0/10
Fit for this guide: 25000mAh and three USB-C outputs suit players carrying a laptop and phone as well as the Deck.
For a festival or a full day of handheld play, the Anker carries the most here: Anker's listing title gives it 25,000mAh and "165W Total Output". Anker lists "three USB-C ports each delivering up to 100W", two of them built-in cables, plus a USB-A port, and says you can "Connect up to four at once", so the Deck, a laptop and a phone can all charge from the one pack. If flying is your main use, our best power bank for long flights guide is the closer match.
Pros
- ✓ The most capacity here, at 25,000mAh
- ✓ Two built-in USB-C cables, so the leads are part of the pack
Cons
- ✗ 165W is the pack's total, shared between everything plugged in at once
Who it's for: Players who want maximum runtime and one pack for the Deck, a laptop and a phone on long trips.
Who it's not for: Anyone who only needs a pack for short sessions and the Deck alone.
Quick verdict
For the Deck plus a phone on the same trip, the UGREEN Nexode Power Bank 20000mAh 145W is the one to reach for, with its cable built in. If you want 20000mAh at 65W, take the INIU Power Bank 20000mAh 65W. For the longest sessions, the Anker Power Bank 25000mAh Travel Essential (165W Triple USB-C) carries the most, at 25,000mAh. Docking the Deck to a TV as well? The Steam Deck section of our USB-C hub guide covers the other half of the setup.
How we chose
We read each pack's stated output against the 45W of Valve's charger and weighed how it handles its cable. Capacity we treated as playtime, which depends on the game and screen brightness; to compare a bank with your Deck's battery, its watt-hours are roughly its mAh times 3.7 divided by 1,000. We take no payment for placement, and every link goes to the Amazon listing so you can check the current port wattages against your own Deck.
FAQ
Q: What wattage power bank do I need for a Steam Deck? A: 45W or more from one USB-C port, over USB Power Delivery: Valve lists the Deck's own charger as a "PD3.0 Type C power supply, 45W". A total shared across several ports doesn't tell you what one port gives, so read the per-port figure on the listing.
Q: Can I charge the Steam Deck while playing? A: Yes. A USB-C port that gives 45W or more matches Valve's own 45W charger, so the Deck charges in play just as it does from the wall socket.
Q: Can I take a Steam Deck power bank on a flight? A: Yes, in your carry-on bag, never the hold. Check the watt-hour figure printed on the bank against the limits in our power bank flight rules guide, which also covers the rules on using a power bank on board.
Affiliate disclosure: This page contains affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. See our disclosure page for details.