Only the best deals on Verge-approved gadgets get the Verge Deals stamp of approval, so if you're looking for a deal on your next gadget or gift from major retailers like Amazon, Walmart, Best Buy, Target, and more, this is the place to be.

Batteries power the devices that keep us all connected, so it’s annoying when they die right when you need them the most. As part of The Battery Issue, The Verge’s week-long dive into the past, present, and future of the lithium-ion battery, we handpicked our favorite portable chargers that will keep your tech going.

The best portable charger that you can stow anywhere is the Anker PowerCore Slim 5,000, and for Verge readers, it’s now $23.99 on Amazon with offer code VERGESL5. It’s slim, as the name suggests, yet with a 5,000mAh capacity, this model has enough power to refill your smartphone from the brink of death.

Other battery packs on our list eclipse the Slim 5000 when it comes to charging speed, but its lightweight build means that carrying it around isn’t a big deal.

Speed and capacity are important considerations when selecting a power bank, and if you need more of both at the expense of a pocket-friendly design, the Anker PowerCore Speed 10,000 is the better option. Regularly $39.99, this model is down to $29.99 with offer code VERGEQC6. For phones that support Qualcomm’s QuickCharge 3.0 fast-charging protocol, you’ll see a quick turnaround in charging time, though we noticed that it doesn’t rapidly charge Google Pixel phones.

The Anker PowerCore Speed 20,000 PD multiplies the capacity and charging speed, and with USB Power Delivery, it’s able to keep all of your devices — including larger, more powerful ones like a laptop with USB-C or Nintendo Switch — running and charging at top speed simultaneously. Usually $99, Verge readers can save 25 percent on this model with offer code VERGEPD5.