How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?How long will battery packs last in the field of new energy vehicles?