... 30pcs7. Content of battery: 280mAh8. Normal working voltage: 3.3~4.2V9. Colors of battery and cartomizer are availablePackage detailsTransparent ... : DHL, EMS, TNT, UPS, AIR, SeaLead time: 1-3 days for samples, 10days for bulk orderCertificateCE,ROHS,SGSQuality Guaranty6 ... voltage alarm function when the batteryvoltage is lower than 3.2V, the LED light will flash 2 times consecutivelyto remind ...