Amaron — battery showing less voltage.

Address:

Galaxy Rubber Products,F-20/A,Phase-1,IDA Jeedimetla,Ph.no 040-+23096044, Hyderabad, Telangana, 500055

I have purchased amaron current tall tabular battery 4 years back (Cr00150tn). Till this date it had worked perfectly. Now the battery is showing less voltage. Before it has worked minimum 4 hours, now it's not working only for 1 hour i think it has charging problem. Please register my complaint and help in this regard by doing your best service as early as possible.