Connecting backup battery

We advise the battery:

CL-18650-29E/3S1P / Backup Battery 10,95V (Li-Ion, 2.67 Ah, 10.95V battery)

You can purchase it from CL-18650-29E/3S1P CELLEVIA BATTERIES - Aku: Li-Ion | Článok: SAMSUNG; 18650,MR18650; 10,95V; 2670mAh; 3A | TME - Elektronické súčiastky Slovenská Republika (WFS)

If necessary, the connector "DC 12V" can be connected to the backup battery 10-12 V with a supplied plug of 3.5 mm. Battery discharge starts as the battery voltage exceeds the appliance's internal voltage of 12V.