Certainly one must by a "penny items" (purchase price of the dealer) do not expect miracles, the micro-USB plug "dose" has from the start game and sits quickly no longer firm enough on the battery connector and the charging process is to "Loads-Loads not "-Lotteriespiel.
The metal sleeve inside the plastic case pushes further into so soon done no more charging, no matter how hard you try, but still make contact.
The metal plug "doses" jack should be welded into the Plastikumantelung, then they would have more play in any direction and could no longer move inside the plastic case in which it is only clipped.
This is a kind of built-in mechanical self-destruction.
We try our luck therefore with corresponding extension cords, which the plug-in contacts in which they are welded surrounding plastic.
PS
The dealer (HandyNow) had demand respect. Of the product held by this evaluation and finally reimbursed from goodwill the purchase price and the postage costs.
Best please me, the dealer would to any such "breaking products" from the range to take and replace them with higher quality products. This creates, in my opinion sustained customer confidence and requires no - positive outcome - Mitigation actions after purchase.