int charge_full = sys_read_int("charge_full", 0);
int charge_now = sys_read_int("charge_now", 0);
int current_now = sys_read_int("current_now", 0);
int charge_full = sys_read_int("charge_full", 0);
int charge_now = sys_read_int("charge_now", 0);
int current_now = sys_read_int("current_now", 0);