EcoFlow 35L GLACIER Classic Protective Cover Extra Battery you can use it as

you can use it as an uninterruptible power supply with 30 ms of switchover time

Ideal for caravan travelling

Some batteries (such as deep cycle) can tolerate this better

5% Peak inverter efficiency: 91% Zero load power consumption: 17W Operating temperature: -20°C to 65°C Ingress protection: IP21 Size:  499 x 272 x 144 mm Net weight: 18kg

EcoFlow 35L GLACIER Classic Protective Cover Extra Battery you can use it asDesigned to keep your 35L GLACIER Classic safe and secure in any outdoor environment. Made from durable, weather resistant materials, it provides the device a full body protection against dust, dirt, scratches, and light rain.