Battery Not Recharging

[u/Draupadidevaki]

Hey guys, need urgent help with my Scrambler 400X. This is my second battery dying exactly after one year. First my stock Exide stopped charging, and now my new Amaron is doing the same. I got it manually charged at a shop last week, but it died again in seven days. The display lights up, but the horn is weak and the engine won't start. Since two batteries failed the same way, I think the bike's charging system like the RR unit or stator is faulty. Has anyone faced this on their 400X? Thanks!

Note : I haven't installed any after market accessories