Amaron — Battery not working properly,return new one

Address:

Jamnagar, Gujarat, 361006

I haves purchase amron battery for activa from diomand battery (Number :5lb-babo202q109959), madhavdarsan, lal banglow, jamnagar dated-20/3/2016.
In three months i experinced battery two times automatally discharged.
When i went diomand shop where from purchase they attend my problem.
Yesterday same problem i faced, when i went diomand shop mr. Alpesh told me that battery was ok i hvae to check my activa's rectifier. I also checked my activa's rectifier from guarage it is found ok.
Do needful in this matter urgently.
I thought that this battery is not good piece, plz replace new one
Regards
My email id: bhavesh. [protected]@ymail.com