I think what you need is the infinix hot 8. Comes with 64gb of internal storage to keep those apps like facebook that usually expands to even 1gb on some devices, games space will be enough also. You can keep some movies in it to. When it comes to the large battery as you mentiomed, it has a 500mah battery which will last you quite long. The battery saving features provided by infinix will have you lasting longer even on constant usage. When it comes to gaming it ha 4gb ram and a very powerfull processor. The screen is 6.5 inches. Watching movies will be much better on it. It csosts 150 dollars if I presume.