As the title says, if you don't check that the cap is tight at the battery area, then you will flood it....
The light (is the keldan torch) seems to be alive as i can understand that is sealed with resin from the battery area.
And i have to fix the Keldan Battery 49 Wh Li-Ion.
New cost nearly 400 euros, so any advice how to fix it will be great.
As i understand, 4 18650 with a microcontroler and the changing are are what makes the battery pack.
How to proceed?