Expensive but worth it
I bought this so I could watch a dvd and gaming in the truck on a night time. Using the truck batteries directly could drain them, and the boss wouldn't be happy with a call out.
I charged to 100% and tested on a film with my TV/DVD combo. After watching a full film, the battery level was only down to 80%. Easy to have an hour or so on the PlayStation before turning in. At nearly £600, it's a lot, but the quality and ease of use is great. About the size of and litre fuel can. I would recommend!
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