Got my SJ7 last week in the UK from FAMLOVE on Amazon Prime. Took 24 mins of 4k movie last week on one battery - footage looks great compared to my old SJ5000. Went to start it up today - 3 days later - and it just won't start. I plug in the USB charger and it starts and indicates a full battery - but pull the plug and it stops. Have latest firmware and two extra, genuine batteries. Going on holiday with grandkids on saturday - lots of surfing video to be taken - have to take the old SJ5000 - I'll just have to return the SJ7 as I don't have time to deal with the issue. Right now it is sitting next to me on a USB charger, doing nothing - and I could fry an egg on it! Would love it to work - maybe come back when the problems are fixed. Also bought the remote I can't use and the extra batteries - will hang on to those until I can buy a reliable version!