Review on Get Your Drone Keep Flying: 5-Pack ENGPOW 3.7V 150MAh Lipo Batteries W/ X5 Charger & Conversion Cables For Mini RC Quadcopters by Tammy Lewis

These do not hold a charge as well as the original that came with my Furibee F36. As others stated, after 10 seconds of flight time, the Furibee F36 starts flashing indicating a low battery. When that happens, the Furibee drone prevents the flip button from being activated. Still debating if I want to return these, and gamble from someone else. I believe it will be difficult to find a good quality replacement.These batteries charge up to around 4.14v. The original charges up to 4.25v. This is consistent across a few tests. The different in 0.11v means the drone won't recognize a low battery as soon. Of course, there is mAh, which I don't believe the new batteries are close to 150mAh as claimed. I'm hoping a seller steps up with a good quality replacement.These still work, as long as blinking and no flips won't bother you. They last around 3 minutes compared to 5 minutes of the original. This still allows me to fly my drone for a longer period of time than having just 1 battery.