The battery life on the iPhone 16 is already pretty good, but sometimes an extra bit of power is warranted. After all, you may be out camping, traveling or doing some other activity where a wall charger isn’t available. For those times, a power bank could be exactly what you need to get you through that second day. 

For Amazon Prime Day, Lisen is putting its money where its mouth is. Not only is the Slim Qi2 MagSafe power bank on sale for 20% off with a coupon code, but the brand is also giving away another power bank for the low, low price of nothing. 

To get the deal, you have to add the Slim Qi2 MagSafe power bank to your cart along with the Lisen Ultra Slim MagSafe 5,000mAh battery pack. Once done, head to checkout and you’ll see that the $25 price of the battery pack is removed. That gives you 10,000mAh of total power for $50 instead of the list price of $75. 

Since it’s difficult (but not impossible) to mess up a power bank in this day and age, both should serve you well. They work as you would expect. Open the package, pop them on the back of your MagSafe-compatible phone, and watch your battery charge. 

According to the Amazon listing, it’s compatible with modern iPhones and Samsung Galaxy phones with MagSafe and with MagSafe-compatible cases as well. Both chargers feature wired charging if you want to use that option, making them compatible with a non-MagSafe phone. 

For the Slim Qi2 model, you can charge at 15 watts over MagSafe or 30 watts wired. The smaller Ultra Slim model does 7.5 watts over MagSafe and 18 watts wired. Otherwise, what you see is what you get with these, and sometimes, we appreciate the simplicity. 

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Why this deal matters

Well, for starters, I haven’t yet seen a BOGO offer that wasn’t worth at least a look. Jokes aside, having two power banks can be helpful. You can pack the bigger one away in a bag for later use while the Ultra Slim model is thin enough to be there in your pocket without feeling too bulky or obtrusive. The smallest iPhone 16 has a battery capacity of 3,561mAh, while the iPhone 16 Pro Max has a battery of 4,685mAh. That means these two batteries combined can charge your phone at least three full times, regardless of model. 

Should you want only one of these, both also have 20% off coupon codes that you can apply once they reach your cart. However, be warned that the BOGO offer overwrites the coupon code, so you can’t do both. We checked. 

More power banks we’ve tested

Power banks are a dime a dozen these days, with dozens of brands selling hundreds of products. If this particular model doesn’t strike you, we have not one, but two lists of alternatives that you can check out. One specifically for iPhones, and we tested each battery bank on the list with an iPhone to make sure it works. The other is for Android phones, and, likewise, we tested to make sure they all work to spec with Android devices.