FlyingMedical,
You said you purchased two more hi voltage batteries, do you mean higher mah rating than standard or the lihv batteries for the h+ and 520. If you purchased the h+ and 520 batteries you need different charge leads and a charger that charges lithium high voltage batteries. Chechnya other wise it can be a costly and time consuming process of sending back incorrect purchases. It sounds as though you have not read the owners manual of your MACHINE????????. The manual is your best friend and can save you money also and remove the camera if you are new to flying the H platform, until you get competent NOT CONFIDENT with yo uh r machine, other wise if you crash a camera is very expensive to repair. Read the manual on this forum and what changes plenty n of YouTube videos.
Happy and safe flying.
Johnno Hennessy.
Keep flying on the green side of the grass.