Check for any physical. If, after checking, your battery has more than 80% of its original capacity, it will not be replaced under the warranty. because it is considered perfectly functional. MK Battery.
Powerline YT4LBS 12v Motorbike Motorcycle Quad Bike Battery Replaces YT4L-BS YT4
Dynamp DTZ10S 12V 8.6Ah AGM Motorcycle Battery - YTZ10S Equivalent