i am looking for batteries too. called b&h in new york and spoke to one of their salesmen. for the record, this is a terrific retailer. he told me that there will be a new tb48 released in a couple of weeks that will provide a guage that will tell one how much charge is on the battery. with this, one can fly commercially now if the tb48 isn't fully charged. they're taking orders now for shipment when they get them.