Bought a new HF elliptical coil on line last week froma reputable dealer I've bought from before. The coil was new in the box however it had a tag on it for ORX v4. Immediately the red flags went up but I attempted to pair it with my version 5.2 Deues and headphones and all went well with that.i charged the battery fully in the coil but it only lasted about 4 hours and died. Recharged the coil again last night and on a hunt today after about 4 hours it only had two bars left on the coil. Is this normal? If seen some comments that an older version coil may have battery life issue if the coil is not the same version as the contro. If so a d this is the problem how do I fix that or do I need to get an actual v5.2 coil? Thanks.