Hi, I need a power bank for my mobile and other gadgets. I checked Mi site but only 10000mAh Mi Power Bank 2i available @799. No stock for other two variants. I have no idea regarding pros and cons of those power banks. So please help me chose right one. Do I need separate fast charger to charge power bank ? If YES,please suggest that one to Also I need AA or 14500 battery/rechargeable battery+charger(which ever is economical for daily use) for my LED torch. I need within a week. I can but from online or offline(Chandni,Kolkata). Please suggest me with online link/deal or local physical store name/location. I can spent max 2K for all above but item must be reliable for daily life use.