EM8610 How long do the backup batteries last? Updated August 08, 2019 10:34 In the case of a power outage, the backup batteries last 5-6 hours. (2x 800mAh lithium batteries) Related articles EM8610 I cannot Disarm the alarm system for free as described in section 6.19 of the manual? EM8670 I hear a warning beeping sound coming from the Siren. EM8610 The blue RFID circle is on. EM8610 Am I able to exchange the battery of the remote myself? EM8610 Sending an command to the EM8610 with as feedback: Wrong input