your battery mixture must be made extremely stupid - there are a few threads here that teach you how to make this the right way - your battery will perform nice.
dont ask - konsa electrician, battery shop will do this, you will have to make it yourself, empty out the battery in a bucket, completely, wash with water and pour in fresh mixture, then take the battery to a shop for charging.
the shop guys dont give a $hit about how your battery will work 2 days later, for them its paisa deejiye battery leejiye, koi problem hai to company se rujoo keejiye