These Panasonic Li-ion 18650 cells have a high energy density, very low self-discharge and a long service life. It is a powerful battery without safety wiring with a temperature range -20 to +60 ° C. This battery is not suitable for flashlights. Panasonic is a first class supplier of batteries of superior quality in non- and rechargeable batteries for industrial purposes. Panasonic's product line has rechargeable and not rechargeable batteries.