Do apple give warranty on their mobile battery?

iPhone Repair - Official Apple Support - https://support.apple.com/iphone/repair/service

"Our guarantee after service

We guarantee our service, including replacement parts, for 90 days or the remaining term of your Apple warranty or AppleCare+ coverage, whichever is longer. We offer this whenever you get service from us or from an Apple Authorized Service Provider. This is in addition to rights provided by consumer law."