When it comes to batteries, buying cheap ones can be a little risky. However, these batteries have a great price tag and certainly are not cheap in quality! These are just as good as the E-Flite 450mAh 30C 2S packs, but come at a lower price! Plus the extra 50mAh gives you a little more discharge and a little longer flight time!
I bought 5 of these and I have been flying them like crazy for the past 3 weeks in my Inverza 280 (Which actually uses a 3S) and in my BlitzRC nano P51 (which these are perfect for!)
They offer excellent performance and flight time. Definitely a great buy!
Just bought the 3S counter part of these batteries. Look out for a review on those too!