This $39 Power Bank Recharges Your Steam Deck 1.5 Times

Power banks are the least glamorous purchase in handheld gaming and the one that most often decides whether a 12-hour flight becomes a playthrough or a paperweight. The Talix 20,000mAh 140W bank — a Lenovo-backed unit that’s a straight rebadge of the Lenovo Thinkplus Fluxo — just fell to $38.99 on Amazon when you apply coupon code AWH6UXYJ, down from a $99.99 list.

The pitch is simple: 74Whr of capacity, a 140W USB-C output, a second 65W USB-C port, and a 30W USB-A. That’s more output than any handheld you own actually draws, it clears the TSA’s 100Whr carry-on ceiling with room to spare, and at this price it’s cheaper than most of the first-party batteries it’s competing with. For a back-of-bag accessory, the numbers are the whole story — so let’s run them.

The Recharge Math: What 74Whr Actually Buys You

The headline figure for our readers is the Steam Deck. IGN’s estimate puts a single charge at roughly 1.2–1.5 full recharges of a Deck’s 40–50Whr cell, which is an honest number once you account for the ~80% conversion efficiency baked into that math. That’s a meaningful chunk of extra playtime — call it a second long-haul leg before you’re hunting a wall outlet.

The rest of the field is where the picture gets uncomfortable. The Switch 2, at just 18Whr, gets around 3.3 recharges, making this bank borderline overpowered for Nintendo’s hardware. But the ROG Xbox Ally X — with its 80Whr battery — only manages about 0.7 recharges, meaning this bank can’t even deliver one full top-up to ASUS’s flagship. The Legion Go S lands at about one full charge. That gap is the clearest possible illustration of how far Windows handhelds have pushed power draw versus SteamOS and Nintendo, and it should shape your buying decision more than the sticker price does.

140W Is Overkill for Your Handheld — That’s the Point

No handheld on the market pulls 140W. Most cap their charging input far lower, so if you’re buying this purely for a Deck or an Ally, the big port isn’t the draw — the second 65W USB-C is. Two high-wattage ports means you can run a handheld at full charge speed while simultaneously topping off a phone, a second handheld, or a controller, which is the actual travel-kit scenario this thing is built for. The 140W output only earns its keep if you’re also carrying a Lenovo Legion laptop with 140W input, which this bank is one of the few to support.

One thing the listing doesn’t specify is the bank’s own input wattage — which determines how fast it refills between trips — so don’t assume it recharges as quickly as it discharges. If you fly with a Steam Deck or a Switch 2, this is a low-risk buy at $39; if you’re an Ally X owner chasing a genuine second charge, put the money toward a larger-capacity brick instead.