iPhones have great battery life, but there are still days when you need a little pick-me-up to keep the battery from dropping into the red. A power bank can definitely help, especially when it’s this cheap: Amazon is selling the like this Baseus Picogo MagSafe battery pack for a mere $19.79 right now, The price you’ll see on the product page is $35.99, but there’s a slew of coupons you should redeem. Plus, you have to use the 8UK6I6S5 discount code over at checkout to get an extra $9 off the price.)

The Baseus power bank has a 5,000mAh capacity, which should be enough for a full recharge of your phone or to keep it near 100 percent for most of the day. It’s also tiny and slim, so when it’s attached to your phone, you can still slip it into your pocket. At just 0.3 inches thick and 3.8 oz, you’ll barely feel the extra weight. If you want faster charging than MagSafe delivers, you can use the USB-C port and a cable to get 20W output. But we bet you’ll stick with the convenience of MagSafe.

For $19.79, this Baseus Picogo power bank is the ideal purchase this summer, so add it to your cart sooner rather than later and apply all of those coupons. It’s a bit of work, but getting a MagSafe power bank for less than $20 is well worth the effort.

Get the perfect iPhone power bank for less than $20