These replacement ER14505 lithium batteries are ideal for use in roller garage door sensor safety systems. Saft 3.6V 2600mAh batteries are extremely long-lasting battery, ideal for use with Securosense, SecuroGlide, Somfy, Rollsafe, Teleco and other roller garage doors using a wireless safety edge system. These long life lithium batteries are replacements for the batteries found inside the wireless device located at the bottom of the actual roller garage door. Changing the batteries is simple, just unscrew the cover, replace the old batteries with the new ones. Be careful not to trap any wires when refitting the cover, job done Please ensure you are ordering the correct battery by checking the existing battery in your equipment. The LS14500 or ER14505 battery is size AA 3.6V Lithium Thionyl Chloride (Li-SOCl2). It has a capacity of 2600mAh. Diameter 14.65mm, length 50.5mm. The reason for two different part numbers is in the detail. These batteries are approximately 14mm diameter and 50mm in length. Saft use the 14 and 50.0 numbers to make up their LS14500 batteries. Other manufacturers use the measurement to one decimal place, 14 x 50.5mm, hence LS14505 or er14505. Both sizes are exactly the same, the important bit it the 3.6V and 2600mAh. These batteries are exact replacements for Ultralife, Maxell or EEMB ER14505 batteries. These roller garage door batteries are suitable replacements for the Somfy AA 3V6 1782078 lithium batteries.