Hi please can anyone advice me how to maintain my battery life?? i charge my mobile every night to 100% when i go to work about mid day my battery levels is 50% and lower bearing in mind i dont use my fone at work !! ive closed apps turned off apps etc and still i have no joy. i really dont want to factory set it as ive done that before when i had the galaxy s4, and i lost qiute a few photo and contacts.. and still the problem remained.. PLEASE CAN SOMEONE GIVE ME ANY IDEAS ????? Thank you :-