Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings

Full Title

Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells > Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings > Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings