Get RC Lectron 1S600-35U 600mAh 1S 3.7V 35C LiPo Pack w/ UMX Connector : Glimpse FPV

I fly a Blade Nano QX2 FPV drone with eight Lectron Pro 600 mAh batteries. I'm comparing them against the single E-Flite 500 mAh battery that the drone came with.Pro: Costs around $2.50 less than the comparable E-Flite 500 mAh battery. According to the description, it's "supposed" to have a larger capacity and higher discharge rate. In theory, the battery should last slightly longer than the comparable E-Flite battery. So I bought a bunch.Con: Although the battery can attain eight minute flights when brand new, it degrades rapidly. After a few dozen flights, these batteries can barely reach five minutes. Meanwhile, the comparable E-Flite battery - with a smaller capacity and lower discharge rate - is still able to keep my drone in the air for almost seven minutes. Which is what it was doing when it was brand new.Conclusion: You get what you pay for. I saved about $2.50 per battery by buying the Lectron Pros. But those savings come at a cost. You sacrifice future flight duration when you buy these. I think I may spend a little extra, and buy more E-Flite 500 mAh batteries. At least I know they will perform like new for longer.

Bought this after I bought eflight batteries, and put it in the rotation. The lectron quit after a few flights. The eflights are also showing their age, but not nearly as bad. Today it dropped the quad with a low battery warning within 1 minute. The charger indicated it had 92% charge left. That means the lectron developed a high internal resistance. Not only that, but the battery is physically longer than the eflights and causes the glimpse to drift backward.

Connector to cells attached poorly. Drains considerably faster compared to E-Flite brand.

Works as it should. Lasts a bit longer than the Blade Glimpse stock (500mah) battery.