The build quality of the battery is good, durable, and sturdy, and it does what you expect. I haven't seen if the salts actually stick to it yet and if it will generally withstand the test of time, just put it on. The hose is of relatively good quality, metallic. The phone is plastic, tiny, and aesthetically pleasing, but in terms of quality, it won't last even three months, but I suppose I didn't buy it for that, so it's understandable...