Don't bet on getting the old model, I was unable to get another AirII to replace mine, it seems to be out of production. I think they were going to send me the only Air currently available, which is the AirMax, which would have been quite an upgrade. Sadly, the AirMax I ordered does not use the 18650 battery, so I can't use the AirII batteries in the new unit. Luckily, I can still use the glass stems...