@starsoldier420 pretty common battery pack on RC equipment. You should easily find a replacement at sites [https://www.ebay.com/sch/i.html?_nkw=Lipo%201300mah%207.4v&norover=1&mkevt=1&mkrid=711-156598-727597-8&mkcid=2&keyword=lipo%201300mah%207.4v&crlp=473229594696_&MT_ID=&geo_id=&rlsatarget=kwd-329891864818&adpos=&device=c&mktype=&loc=9028006&poi=&abcId=9110001&cmpgn=11203831881&sitelnk=&adgroupid=108688800414&network=g&matchtype=b&gclid=CjwKCAiAwKyNBhBfEiwA_mrUMm3nJiSbl-xKZ6Rf9iqnJlPYrjHvPkGt16LG_0o3Ddf7T9YNyvqIWRoC3kcQAvD_BwE|like this]. All you would need to modify might be the connector.