The Anker 20,000mAh Power Bank is a portable battery that can keep your phone, tablet, and laptop running through a long flight, a power outage, or a weekend camping trip. The 20,000mAh capacity translates to four to five full iPhone recharges, two iPad recharges, or a single emergency laptop boost before the bank itself needs a recharge. USB-C with Power Delivery handles fast charging on newer devices, while a separate USB-A port supports older phones, e-readers, and accessories. The case is small enough to fit in a coat pocket and durable enough to survive being tossed in and out of bags.
A high-capacity power bank that you can rely on in a pinch
The Anker’s 20,000mAh capacity converts to approximately 74Wh of stored energy, well within TSA’s 100Wh carry-on limit for lithium batteries. The LED indicator on the case shows the remaining battery percentage, so you can tell at a glance when it’s time to top off the bank. Plus, pass-through charging is supported, so you can charge your phone from the bank while it’s plugged into the wall.
The USB-C port supports fast charging via Power Delivery, which matches the charging speeds most newer smartphones support. iPhones reach their maximum charging speed, while many Android phones also support fast charging. The USB-A port supports slower charging speeds, which is fine for older phones, e-readers, smartwatches, and game controllers. Plugging in two devices at once splits the available power between them, so charging for each device slows slightly.
The Anker weighs around a pound, which is enough to notice in a bag but not enough to make daily carry a hassle. The textured shell resists fingerprints and minor scratches. Recharging the bank itself takes a few hours from a standard USB-C wall charger, though faster wall chargers can speed that up. The internal battery maintains capacity well across hundreds of charge cycles, giving the bank a multi-year lifespan.
The Anker doesn’t include a wall charger in the box, so you’ll need a USB-C wall plug you already own to recharge the bank. Most people already have one on a phone or laptop, but it’s worth confirming if you’re buying this as a gift. The maximum output also won’t fast-charge a high-end laptop at full speed, though it can keep one running for a while in a pinch. Lithium batteries are also restricted to carry-on under TSA rules, so don’t put the Anker in checked luggage on travel days.
The Anker 20,000mAh Power Bank handles phone, tablet, and laptop charging across long days away from outlets, and at $50, it’s a great deal for a daily-carry battery that’ll last years. If you’ve been making do with a smaller bank that doesn’t quite make it through the day, the $20 off is your nudge to upgrade.
