Summer's chart-breaking heat makes many people want to stay cool inside during the daytime until temperatures are "more bearable" in the evening. But another problem arises as the sun sets: mosquitoes come alive!

In order to make your deck, backyard, or porch hangouts enjoyable, a mosquito repeller that keeps the bugs away is a must—and this one is a shopper-favorite for under $40. The Thermacell E55 Mosquito Repellent is a rechargeable way to fight back against mosquitoes. The lightweight gadget—it weighs less than 1 pound—starts working in just 15 minutes and creates a 20-foot zone in which the pesky bugs can't reach you.

The repellent has almost 6,000 five-star ratings, and it's also climbing the best-seller chart in Amazon's Patio, Lawn, and Garden and Pest Repellents categories.

BUY IT: Thermacell With 5.5-Hour Battery, $37.17 (orig. $39.99); amazon.com

"I've tried citronella candles, torches, fogger, just about everything, and Thermacell is the only thing that really, really works," shared one five-star reviewer. "Easily the most effective and convenient mosquito repellent on the market," added another shopper. 

Thermacell notes the rechargeable device works best anywhere mosquitoes are present, like your backyard, porch, deck, or pool. And, unlike candles or torches, you won't have to worry about flames: The pet-safe mosquito repellent device uses a rechargeable lithium-ion battery to warm unscented liquid inside its 12-hour replaceable cartridge when the gadget is turned on. Plus, you can choose from the 5.5-hour battery model or the 9-hour battery model that's only $10 more. 

BUY IT: Thermacell With 9-Hour Battery, $49.99; amazon.com

"Charges quickly and charge lasts as advertised," wrote a shopper who titled their review "Best Product Ever." Another user, who lives in an area of the South where "mosquitoes range from bad to horrendous," added, "I try not to gush on reviews, but this product has been a game changer for us."

Don't let bugs ruin your outdoor oasis. Preserve your summer nights and transform them into a mosquito-free experience with the Thermacell rechargeable mosquito repellent. A night without bites is worth the $38 investment.