Seen this on web https://hobbyking.com/es_es/catalog/...00mah-5s1p-45c, (I know they are on the heavy side) Does any one try this kind of batteries?. More cycles per batt life, less internal resistance, more power delivery, safer than lipos, sounds promising.

I'm not sure they are much 'safer' than a standard LiPo
High discharge (C) rate (lower IR) batteries are always heavier than lower C rated batteries (higher IR), so if you can afford the weight, there is no downside electrically.
These seem more like an EDF battery than an F3A battery to me.

For F3A 20C batteries are perfectly OK. The blue Turnigy ones have also lost 100 gms weight and are now lighter than the Zippy Compacts as well as being cheaper. It works out at around £1 (pound sterling) per flight.

I've also switched to the Zippy blue 5000/20's. So far, so good.

I am using the Turnigy 20C 5000mah packs. Still have not really weighed them but they perform really well for the price. Have about 40 cycles on one set and a little over 20 cycles over the other two sets. Still have low IR values as well. 3 or under for every single cell.

If you could measure their weight that will be really helpful. From my epxerience HK specs are quite optimistic and batteries advartised weight is less than their actual one.

Funny you should ask. Just yesterday I brought all my stuff into my work to weigh everything. The two sets of Turnigy packs weighed in at 1100 grams. So this is two 5s packs together for one set. I really thought the Turnigy packs were going to be heavier than a set of Blue Lipo packs I have. But they were 100 grams lighter.