Product Name: HKC Miniature wireless magnetic contact with shock - Brown https://www.securitywarehouse.co.uk/catalog/intruder-alarm-equipment-c-36/wireless-ia-c-36_60/hkc-miniature-wireless-magnetic-contact-with-shock-brown-p-5971.html ------------------------------------------------------ Can I change battery on this unit myself. Rf mcsb . I do all my own DIY. I only want to know how to change the battery on theses contacts as engineer is always busy . I understand that any more serious issues with alarm needs an engineer to fix . Can you help.

 

You can usually change them yourself but it is usual the batteries are replaced every 2 years on the service. Care needs to be taken as you can easily damage them if opened incorrectly.

Also you may breach your service agreement