Maintaining Battery Condition - Duracell Digital inverter 400 Owner's Manual

6 Maintaining Battery Condition

The battery operating time of the Inverter depends on the charge level of
the battery, battery capacity, and the amount of power drawn by the AC
loads you are operating. With a typical vehicle battery, you can expect
the following:
Table 5 Battery Operating Times
Load Sample Appliance
50 W CD player
100 W small TV
200 W TV/VCR
20
Operating Time
6–8 hours
3–4 hours
1–2 hours