purchased this battery kit for my Sony A7III because I was already familiar with the brand, having previously purchased other photographic products from the same brand with excellent results. The quality did not disappoint. The batteries have a capacity practically identical to that of the original Sony: the battery life is very similar, perhaps slightly less, but having three available allows you to easily cover even fairly long photo or video sessions without any battery life issues. The charging base is very useful, well-built and compact, allowing you to charge multiple batteries simultaneously. It features a small backlit screen that clearly shows the charge status of each battery, turning off automatically once charging is complete. The times are in line with the original: about 4-5 hours for three batteries simultaneously; if you charge just one, however, the times are shorter because all the energy is channeled into a single battery. The build quality is excellent: I have not encountered any compatibility issues, overheating, or malfunctions, and the batteries are easily recognized by the camera. Considering that at the price of this kit, you can barely buy a single original Sony battery, the quality-price ratio is truly excellent. For those who shoot frequently, travel, or work outdoors and want to always have a set of reliable batteries, I recommend this solution without hesitation.