Ok3ch,

It's just now I realize you were born and bred in Nai.

In the village where I grew up, we used to nicely cover those dry cells for Sanyo radio and boil them for a few minutes in order to increase their power. That is after the radio started doing korokokokoko...
Sometimes we just anika-ed them in the sun for several hours and the radio would do better upon the restore of the batteries. These Japanese have just beaten us to the "mass production" of a technology we knew about nineteen chon gi nene!