Got the Xpower
batteries in both the 650 and the 900 and am happy with 'em.
Only wish Smoore had made these half a year ago, so I wouldn't have taken a long detour of buying a Hello, Maxx and Riva, all for the purpose of firing my favorite M301 and M601 atties and cartos with the use of an adapter.
Now with the X, I have a direct-fit M301 battery. Glad a genuine Smoore vendor with your service and quality was the first to carry it within the US. And quick free shipping too, with over $15 purchase.