Part Number:Honeywell 103-301179 300-03864-1 LKP500-4B Quality Certification: ROSH, CE and UL triple certification. No memory effect, over-charge, over-discharge, over-heat, over-current and short-circuit protection If your wireless device's cruising time is significantly reduced, you should replace the battery. Fit Model Honeywell Lynx L5200 Touch 2 Lynx L3000 Lynx L5000 Lynx L5100 K5109 L3000GSMPK LYNXRCHKIT-SHA L5000 LYNX TOUCH L5100 LYNX TOUCH L5200 LYNX TOUCH L5210 LYNX TOUCH L7000 LYNX TOUCH Lynx Control Panels Lynx Touch control panels Lynx wireless alarm control panel Lyric Keypad LKP500-EN Ademco 781410403291 Ademco WALYNXRCHB Ademco 55026089 Ademco K5109 Ademco WALYNX-RHCB-HC Ademco WALYNX-RCHB-SC Ademco Lynx Ademco LYNXRCHKIT-SC Ademco 300-03865 Lynx Touch L5200