i bought this battery for long range (10+ miles out and back) fpv flights with my skysurfer, aka bixler1, because per the advertised specs its the smallest and lightest 5Ah 3s battery i've come across.
in reality the battery is larger than advertised (this unfortunately seems to be SOP with VH batteries), 29x43x135mm to be exact, but it still squeezes into my skysurfer fuse and, more importantly, it really is an honest 5Ah @ just a hair over 370g. in fact, with the car connector and some of the main leads trimmed of it clocks in at just 367 gram.
its taken my fpv plane over 18km out and back so overall i'm very happy despite it being slightly larger than per the specs. no launch problems at all with a standard skysurfer, although the increased weight makes for higher stall speed so its important to give throttle while banking.