2PCS Panasonic 18650 NCR18650B Rechargeable Li-ion Battery, Flat Top 3.7V 3400mAh, BONUS One Hard Plastic Case For Easier Storage and Transport HIGH ENERGY DENSITY UNPROTECTED CELL FOR USE IN VARIOUS DEVICES REQUIRING HIGH POWERED BATTERIES BONUS ONE HARD PLASTIC CARRYING CASE PROVIDES 3400MAH 3.7V SHELF LIFE OF 3 YEARS BE SAFE AND FOLLOW ALL BATTERY SAFETY GUIDLINES