Looking for a mobile charger I stumbled into a local electronics store on the Goobay battery. 1.5A should he may submit and keep 5000mAh capacity. Given the small size, I could not quite believe it, but my big battery's smartphone with 3500mAh similar size was (if one case and a small controller board added thinks). The first full charging at a charger with 5V1A went quite quickly, a little too quickly for my liking, I had the battery but previously emptied completely. After about 4 hours of charging was terminated. Incl. Charging losses etc. corresponds the real capacity so probably 3200-3500mAh. The next disappointment came when unloading. Instead of the promised 1.5 A, the unit provides a maximum of 1A. However, this is good for the most demanding devices. Nice feature: You can also load USB devices while the battery is being charged themselves. Many competitors can not. However, the charging current must not be interrupted, because then the outputs switch off as soon as the charging process starts again. As a back-up battery for Dynamo charger on touring it is so only partially. My Galaxy S3 LTE can I accurately charge again in operation one time and then to 40%, until the battery is empty. The build quality is ok, but revealed shortcomings in the electronics. The platinum material used is cheap, the solder joints are often not properly executed. The first device I had to leave after a few days use of exchange as the mini-USB connector for charging had resolved by the board and disappeared inside, the second device but now works for a couple of weeks perfectly. The value in use is high despite the exaggerated values. When time has to manage a weekend without power or wants to play an afternoon in the park Ingress, the battery lasts. For more demanding, however, the unit is out definitely. Two smart phones in standby simultaneously recharge example remains with this model wishful thinking.
