Anker is a quality brand for sure, I own a number of their products. My OEM battery, which really started draining far too quickly recently, I replaced and considered getting the Anker. But instead I got this because it's supposedly 3600mah instead of 3220. It's running great! I can't say for sure it lasts longer than a 3220 would as the only one I have to compare it to is close to dead, but It does seem too