> Smartphone battery life is so shit, on every model, that I always plug my phone in.
Buy a better phone next time. I'm currently using a Xiaomi Redmi Note 5 which lasts about 5-6 days on a single charge (10-15 hours of screen-on time), before that I used (and still use when doing 'dangerous' work) a Motorola Defy which lasted almost as long on a single charge. Neither of these phones were the newest or thinnest when I bought them, both of them have a relatively large battery (4000 mAh in the Xiaomi, 1750 mAh in the (> 8 years old) Motorola). Neither phone had the fastest SoC when they were launched.
I also removed all bloat from the devices before using them, either by swapping the default Android distribution for an alternative of by disabling/removing unwanted packages. This alone adds a day or two to the longevity.
Buy a better phone next time. I'm currently using a Xiaomi Redmi Note 5 which lasts about 5-6 days on a single charge (10-15 hours of screen-on time), before that I used (and still use when doing 'dangerous' work) a Motorola Defy which lasted almost as long on a single charge. Neither of these phones were the newest or thinnest when I bought them, both of them have a relatively large battery (4000 mAh in the Xiaomi, 1750 mAh in the (> 8 years old) Motorola). Neither phone had the fastest SoC when they were launched.
I also removed all bloat from the devices before using them, either by swapping the default Android distribution for an alternative of by disabling/removing unwanted packages. This alone adds a day or two to the longevity.