I have had my gbx155 for just a year and a half, I went to use it and it would not turn on, it would not charge, nothing. I was not real happy with it at all to start with. It was fast to discharge, extremely slow to charge. Well over a day sometimes 2 or 3 to charge. I owned a gb70 and it was twice the booster pack. the GB 70 was very quick to charge and did everything that the GBX155 did, the only thing I disliked on the 70 was the micro USB as compared to the USB C on the 155. Not sure if I had a lemon of a product, but I sent an email to Noco customer service explaining my issue, and was pleasantly surprised that they warrantied their product even though it quit after a year and a half and I did not submit an email complaint until almost 2 years post. Thank you Noco for your support of your product. I hope the new one solves the issues with the previous product I had.