The LYNXRCHKIT-HC is a 7.2VDC 2100mAh rechargeable battery pack used in the Honeywell LYNX Plus and LYNX Touch Series control panels. This is a high capacity battery that will give you backup battery power for longer than the standard LYNX backup battery.
I had purchased the new battery for my home security system and the Geoarm customer Service had explained to me how to install it. Everything works perfectly. Thank you Geoarm!