2 Out Of 3 Batteries Drain FAAAAAAST!

[Phaedrus]

Looks like it will let you fly more longer if you are a super fan of drones

Never used them. Some aftermarket packs are fine, some are junk. I'd try one to see if it lives up to their claims. Be aware that at 50% more capacity it will likely weigh a bit more. So that could be a factor in performance and higher weight will generally eat up some of the duration due to the extra power needed to haul it around.

 

[Steve Carr]

Does anyone have experience with this off brand battery for the H520?

I would use the standard H batteries or even the Ultrax before buying that one. Several people have tried those and had poor results.
Do a search on eBay for Yuneec Ultrax and you'll find them for around $68.

 

[arruntus]

It's been asked more times in the forum. These batteries to some have been inflated in flight and then had to disarm the drone to remove them. I wouldn't risk the H520

 

[PatR]

Change disarm to disassemble.

 

[arruntus]

Some have sent it to the official technical service, which they had to laugh there, and preparing the invoice even more xDDDDDDDDdddddddddd