TIP: luminous period more than tripled ..!

Have the lights chain a bit "modified".
Simply the fairy lights without the colorful hat stuck in a mason jar with a hot glue gun.
And the electrical unit either the lid or top.
My model for this purpose was the "sun glass" or "solar glass" here at Amazon.
Thus, not so much moisture comes to the electronics. Looks much better than the cap.

!!! A little tip for the burn time: !!!

As a battery here a normal rechargeable AA battery is used.
This, however, has only 600mAh and 1.2V.
Most batteries can be bought at any store at least 1700mAh 1.2V and also
I use a AA-battery-battery even 2100mAh.
Then everyone can imagine that the light duration by more than tripled.
Simply unscrew 4 screws from the case and you can already change the battery.
I for one had directly bought by my first order 2 more lights and am very satisfied.