Thanks. It seems to be the 2550kv version. Here are some numbers about it[0]. It might hover at idle if I read this correctly. I don't see how they do it at 19

Thanks. It seems to be the 2550kv version. Here are some numbers about it[0]. It might hover at idle if I read this correctly. I don't see how they do it at 196g though. 4 * 31.6 + 2 * 47.5 = 221.4g, with 47.5g being the weight of one 18650, as this is what seems to be inside (weight of a Sony VTC6 taken from [0]). The energy density would have to be a lot better than this, I don't know a thing about non-rechargeable batteries as suggested by others in this thread. [0]: https://www.youtube.com/watch?v=u2v1QLmhNxM https://www.youtube.com/watch?v=u2v1QLmhNxM