u/Apart_Illustrator151

i haven't used my 3ds in a long time because the charger broke but i bought a new one today. whenever i plug it in the charging LED would turn on for 5 seconds then turn off. searched around and some forums said to reseat the battery but when i opened it up i saw that my battery was like this.

should i replace it or would it be safe enough to use for now till i get a replacement? thanks! (any suggestions to also fix the charging LED thing would be great!)