- Proceeds received by the seller to test his product and collect user reviews. Comment drawn from this test and impartially. Having a lot of mobile devices, phones, tablets, routers ... I have long since acquired different batteries! Their usefulness is well established. Only one manufacturer to another, the reliability and the level of finish is highly variable. In the end this is what counts daily. This battery is well protected in its packaging and is not likely to arrive damaged. The flat cable supplied bear the purse and the vagaries of life without aging prematurely as some cables while thinner and less solid. I've been testing other batteries such as TeckNet Powerbank 7000mAh and is less well finished and has a tendency to crackle and hiss in use and load (not to mention the finish that makes assembly house). This battery for extra power does not have these defects suddenly I recommend it and I'll sell the TeckNet.