Quick reply...
I cannot make sense of powertop, so here some memorable lines of it:
dss (100% ON), core (100% ON), neon (14% INA, 7% RET, 1% ON), mpu (14% INA, 7% RET, 1% ON), per (14% INA, 1% ON);
IRQ#56 activity 174 i2c_omap;
frequency 250MHz 93.7%, 600 MHz 5.4%, 500MHz 0.9%;
total wakeups 1062, of which 604 timers and 458 IRQ
I could give the whole output if there was possibility it would help, or run-install some other commands. Or I could calibrate the battery... never calibrated it before.
Best wishes.
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Per aspera ad astra...