Have the flash now less than a week. The flash output is completely sufficient for indoor shots and portraits. I was surprised about the Stroposkoplicht, this works well enough. After about 210 shots, I changed the batteries (NiMH 2300mAh). However, I have not permanently fired at full flash output but with different flash output (about 40% of the shots with fill flash in ETTL mode, 30% at full flash output level, 10% with the Stroposkopblitz and 20% as a slave flash with half power) .The Flash charging lasted for a full flash for about 3 seconds, just before I changed the batteries lasted the recharge then already by 9 seconds after a full flash. But 200 shots find first quite well, depends always the battery from. The only drawback to this device, I found the battery compartment. The flap of the battery compartment Solte conclude with some caution. It is not necessarily smooth and when closing these you should take some time and look at exactly what you are doing. The flap is shaking too much to the side. The product is recommended for the price and if you later a high end flash should be set up, the YN 468 II is a good addition.