1 of 1 people found the following review helpful.

GB 40 Light Control Button Issue

GB 40 & GB 50 light control button has a major design flaw. The light on/off button can be accidentally activated to the on position causing the Battery to discharge over a prolonged period, if not noticed being on.

it is quite easy to not notice it being on, as it is in a dark black nylon carry bag with a red pull string to close. Button can be turned on from bumping into your leg or the inside of a carry bag. I have come to my bag to pull out and noticed light was on. Great boost packs (GB40, 50) but the on/off button is an issue and should be re designed.

Thanks for listening.