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I want to buy a power bank of around 10,000mah battery. my budget is 1000-1500. i am confused between samsung 9000mah and advent m400 power banks. please suggest me which should i go for. Is advent a reliable brand?
Already available unofficially for that price.
I would suggest you to watch the review done by c4etech.

Damm, this was not expected from Mi3. As for a replacement even if refurbished one.