To gauge flight performance, we put the drone through a number of tests to see how the manufacturer’s claims hold up. First we take it to a local football field and see how fast it can clear 100 yards, then do some calculations to get an objective reading on speed in miles per hour. After that, we do a similar test to assess ascent and descent speeds, and all the while, we’re also taking notes on how responsive the controls are, how stable the craft is, how far it can go before it’s out of range, and what the overall piloting experience is like compared to other drones.
As it is for every gadget out there, a buyer must set realistic expectations when buying a cheap drone (or other devices).  If you set expectations that are too high, chances of being disappointed ultimately are high, and this may ruin your drone flying experience.  Instead of the high standards, expect far less from the device and let it surprise you instead while providing you with so much excitement in the process.  You may consider buying a spare drone also.
You can pair the Tello with a third-party gamepad controller, but it’s easy enough to fly using the simple, intuitive Tello app. Thanks to its link with DJI (the Tello’s flight controller is made by the drone manufacturer), it’s a great ‘first drone’ for kids or adults looking for a learner model to practice on before moving to a bigger quadcopter like the the DJI Mavic Air.
The JJRC H26WM is a great drone for beginners or those who want a casual drone to zip around with. The camera is pretty decent but nothing too fancy, so don’t expect the world from it. The maximum amount of flight time you can get is approximately 7 minutes, so having an extra battery is a good idea. The camera allows for 2MP in FPV which swings around in all directions.
The UDI 818A comes ready to go right from the box. The only thing necessary is to charge the battery, which can take up to an hour. While this can be annoying, the wait is worth it, as the 3.7V 500mAh LiPo battery lasts a full two to three minutes longer than Quadcopters like the Syma X5C. Along with that, included in the box are also four backup propellers, a mini screwdriver, battery charger, and USB connector for the attachable camera so that pictures and videos can be saved right on to your computer.
Although this HD Drone can be flown safely outside, make sure to avoid too much wind whenever possible. This is a lightweight drone, and as such it is susceptible to harsher weather conditions than some of the heavier, higher end drones. For hobbyists just itching to go out on blustery days when the wind is howling, try leaving the drone at home and taking a kite out instead.
The maximum distance your quadcopter can cover, and where it can be flown, are determined by its overall weight and size, i.e., the weight after all the attachments or payload have been added. The best drones under $100 usually weigh less than 0.55lbs. Thus, they can be flown in most open areas in the US, except in airports and buildings if you have no license.  
If you are a beginner just learning to fly with these cheaper drones, take your time to learn the controls by flying in a safe area that is a wide open space, with no wind, and no obstacles. At first, fly low to the ground until you can maneuver your drone correctly. Practice flying on a single battery charge and then let the drone cool down for ten minutes before flying more. 
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