A great part! 3

I bought the replacement battery, because I go to the phone to geocaching. Previously, it was unfortunately the case that I - depending on the reception - after about 2 hours and was nervous after about 3 hours the battery was empty then.
The replacement battery I have attached to about 3 hours at about 20% battery power and then was still 3 time hours on the road. When I after 6 hours was back at home, but the battery was not about empty but I came back with 100% charged battery! So does the whole thing fun!
That with the supposedly short charging cable in previous reviews does not arise, because there was none at all there and you can use the original charging cable. The 4s fits in perfectly. It is then a little bigger and heavier, but I do not want the replacement battery constantly tuned leave but use only when needed, therefore does not bother me. A manual is also now not there, but that does not matter, because a part with only one usable control knob is really self-explanatory.
I am fully satisfied in any case and the price-performance ratio is super.