Which (Dianer, Yubo, Pinsheng) should I choose for the newly bought 4S back clip battery or charging treasure? Ask an expert how to answer the battery of the battery.

Buy a charging treasure. It is inconvenient for the battery to be caught in the back. Charging treasure can also be used for other devices. Ubo doesn't recommend it. Before, the computer reported that their charging treasure used batteries (notebook batteries) instead of lithium batteries used in our mobile phones, which was unstable. That clerk is not bad. He advertised in CCTV, and then I read the disassembly diagram of the computer newspaper, and the materials used were not bad. As for the product win, the conversion efficiency is only 80%, and the clerk is about 95%.