Bought and approved. I can not say anything yet about durability. Can be loaded with the original charger. Update 20:11:14: I bought the battery for my GM 1. As with previous speakers I would recommend this part fully. The slight underperformance I have noticed in any case. The service is courteous. Compared with an original Panasonic battery, for me not the question of what to decide. The price is unbeatable for performance. Will certainly buy again at Star Bundle.