LiHV Multi's are lighter than most others with similar power.
Performance, unknown caller used 2 off these and hit 58k ft (40 min flight) out and back but he hasn't submitted that flight to the LB. I've been 45k ft out and back, my location is letting me down from going further, due to signal interference.
I use a basic cheap charger & parallel charging board from hobbyking, I only have 3 batteries so this is ideal for me
Turnigy Accucell-6 50W 6A Balancer/Charger LiHV Capable
HobbyKing Parallel charging Board for 6 packs 2~6S (XT-60)