Buy this charger, I use 2 of them and they are stable enough.
http://www.amazon.in/gp/product/B00ON6HAR8?ref_=gb1h_img_c11_7427_0e2f48d4&smid=A22PCH2EDHVQY
For casing and micro sd, try using 100 off on 150/200/250 coupons available on ebay. Google a bit and you can find them.