Sorry to bring back an old post,
But mine is doing the same thing. It charged two batteries up to 4.34v/cell.
Called Horizon and was basically told sorry no warranty for Orion.
I said I understand but can I send it in to be repaired.
Sorry, don't repair electronics.
He said especially on older model products.
I said a 1 year old charger at this price should not be considered older.

Any thoughts???