Czxin 2pcs Original 3.7v 700mah Rechargeable Li-po Battery Spare Parts for SKY Hawkeye Hm1315s 1315w Rc Quadcopter

Ordered these as extended life batteries for my Sky Viper S670 Stunt Drone. Right out of the package, without charging, I got an extra 3-4 minutes of "heavy" flight time (stunts, lots of movement). I was worried the extra ounce or so of weight would make any extra flight time a wash, but not so. These fit perfectly in the drone. The connection wire is *just* long enough to not need any modification. The tightness helps keep it in place since the battery is longer than the original and doesn't allow the original keeper to work. I flew it hard, did stunts, and crashed hard a few times and the battery didn't move. Worth the few dollars to have some extra batteries and get more fun out of the drone.

Worked perfectly for my Sky Viper S670. Lasts twice as long as original battery that came with the drone. They are bigger so you have to remove the battery tray to make them fit. It's not a problem though because when the wires are attached it holds the battery in place pretty well. We had one big crash where the battery flew out, other than that they have stayed in place. Well worth the small cost to get 4x more fly time per outing.

I have the s670 stunt drone. These batteries are twice as big and have twice the flight time as the one that came with the drone. You have to install the battery in the drone without the battery tray but it works fine. Works great actually. I recommend.

Works great, fits well, and extends flight time. Good job and happy flying!

Totally not a matching product for what I had but better! Larger battery but it fit and gave me double the flight time!

Batteries operate as advertised. Great deal on some good batteries.

Does its job and works. Nothing bad and nothing special

Works great and fits the sky viper perfectly