Hello

We implemented a small-sized VRLA (AGM Valve Regulated Lead Acid) battery project on the number of 10 ethers.

In these batteries, sulfuric acid with a density of 1.250 and each battery cell was charged with 70cc of acid.

In these batteries, instead of the terminals, a cube-shaped terminal made of brass with tin coating is used. which were soldered using tin on the relevant place.

For some reason, these sockets lose their silver coating and turn yellow after electrical charging.

I have two questions for my friends:

1- What is the main reason for this and how can we prevent it from happening again?

2- The items that are stained and look bad because of this, considering the installation on the battery and gluing, etc., how can we fix the battery without damaging the body and its lid made of ABS plastic. Should we fix the stain?