E-flite 500mAh 1S 3.7V 25C LiPo High Current UMX Connector EFLB5001S25UM Battery

Seem to be a great battery I get 8 ish minutes on a tiny whoop with 19000kv motors just cruising around and have great punch when needed. Highly recommend

For those of you considering the purchase of the Lectron Pro 600 mAh batteries, you might want to take another look at these. Because although these ARE more expensive, they continue to perform after literally dozens of flights. I can't say the same for the Lectron Pros. Make no mistake; the performance of both these and the Lectron Pros will degrade over time. But after approximately two dozen flights, the Lectron Pros have lost more than half their capacity. When new, the Lectron Pros started out providing flights of 7 to 8 minutes, but now can barely exceed 3 minutes. The E-Flite batteries provided flights of 6 to 7 minutes, and are still able to reach 6 minutes after the same number of flights as the Lectron Pros.For me, the decision is clear. I'm spending the extra money on batteries that maintain their capacity over time. I'm buying more E-Flite batteries.

Not a whole lot to say here..it's a basic battery. Thay have always worked pretty good in my baby drones.

Physically longer than the original batteries, but they still fit in the heli and work well.

Better price than most hobby shops