Summary

The classic dual LED headlamp from ebay and possible also many other sources, has a very ignoring design fault, it is VERY easy to turn it on in your pocket or backpack or where ever you store / cary it. This means it can be flat when you need to use it..
with this button protector glued to the top as shown, this problem is not going to happen again,
it is still easy to access the buttons with your fingers, when you want to.