Sony Xperia Zl — Very poor battery & heating problem

Address:

Nawada, Bihar

Sir, I have bought this mobile Xperia ZL model on dt. Feb. 2014 The mobile has been very poor battery life and the work of very slow it's a 3 more times replaced some of the problem every time so, i am request my mobile changed other models ex. Z2 extra cost of the handset I am paying. Please sir regards kindly. My cont.no. Is [protected]-[protected]