Consumer Redressal

I purchased an HP laptop on August 11, 2013. During the period of warranty,o.e. until August 11, 2014, a number of faulty parts had to be replaced, one of which was the external battery, which was replaced sometime between March-August 2014. In November, the replaced battery stopped working. Upon calling the HP helpline regarding the same, they claimed that according to company policy, the warranty of the replaced battery is only 3 months, despite the fact that a similar battery purchased from the market has a battery life of 3 years. I feel extremely cheated as a consumer because the purpose of warranty ( benefiting the consumer by effectively replacing faulty parts) has been defeated because it shows the glaring possibility that second hand or used parts are used for replacement purposes. I seek compensation for the cost I am about to incur for replacement of the battery, and for mental agony caused on account of deceptive policies.