Tried to use a Winplus booster I bought from Costco maybe 3 or 4 years ago, and the case was split open and looks like a battery pack expanded and I can't squeeze the case back together. If you have one of these in your trunk (maybe it was t heat?) may be a good idea to check it before you need it. I picked up a NOCO booster maybe 4 months ago and kept it in the glove compartment, and it worked. Ken Tried to use a Winplus booster I bought from Costco maybe 3 or 4 years ago, and the case was split open and looks like a battery pack expanded and I can't squeeze the case back together. If you have one of these in your trunk (maybe it was t heat?) may be a good idea to check it before you need it. I picked up a NOCO booster maybe 4 months ago and kept it in the glove compartment, and it worked. Ken