Batteries melting in Kobalt lawnmowers KPM 1040B-03. I had this lawnmower for 3 months and when I installed the battery today to mow my lawn it stalled after 5 minutes of use. I opened the battery compartment and saw that there battery fluid has oozed out into the compartment. I returned the mower to Lowes and got another one (same model). I took it home and assembled it. I opened the battery compartment and I saw that it battery fluid had previously oozed into the compartment. I didn’t even put the battery in the compartment.