A mate and I just purchased this item. We both had the same problems with power up. He just kept taking the batteries out to restart. Eventually his came good. Mine did not. I read this and completed the hard start. Power up problem has gone. Thanks to this forum for the information gathered by users. Both these items were purchased in the UAE Dubai. We are on holidays from Australia. Items will be used for motorcycle outback trips. Replaced a Etrex Venture Cx.