Last week Blu Cigarettes alerted its customers of a important problem with the Blu Pack battery. The battery in the Blu Pack has the potential to overcharge and rupture. You should stop using the Blu Pack immediately. More info here
Thankfully you can still charge and smoke your Blu Cigarettes using the wall or usb charger. The actual Blu Cigarettes are free from battery problems and can still be smoked. You just need to charge them with the included wall and usb chargers.
Most importantly Blu Cigarettes has worked with the manufacturer and implemented changes to the Blu Pack design that will eliminate the risk of over charging. Blu Cigarettes should receive the new Blu Packs in 4-6 weeks and will ship and replace your old Blu Pack at no expence if you already purchased Blu Cigarettes.