I use this product for several months now with a phone whose battery is 1600mAh. One could therefore expect at least 4 full recharges. In practice I actually 2.5 at best. If I do not use the battery for several days and that it has been fully charged (when I say several 4 or 5 is not 20) I already have a diode and less, which means according to the manual a loss of 25% of the initial charge. And that's a shame because the weight is reasonable and aesthetics rather successful.
