Your Battery Number Is a Guess

That battery number is a guess. Tag the friend who panics at ten percent. Your phone shows a battery percentage, a clean, exact-looking number sitting right there in the corner of the screen. It feels like a plain fact.

To číslo batérie je len odhad. Označ kamaráta, ktorý panikári pri desiatich percentách. Telefón ti ukazuje percento batérie, pekné, presne vyzerajúce číslo priamo v rohu obrazovky. Pôsobí to ako holý fakt.

It is not a direct measurement. There is no simple way to open up a battery and read how much power is left inside it. Instead, the phone checks the voltage and the flow of electricity moving through the battery, then runs those numbers through a small program that estimates the rest, based on how similar batteries usually behave.

Nie je to priame meranie. Neexistuje jednoduchý spôsob, ako otvoriť batériu a odčítať, koľko energie v nej ešte zostáva. Telefón namiesto toho sleduje napätie a tok elektriny cez batériu a tieto hodnoty potom preženie malým programom, ktorý zvyšok odhadne podľa toho, ako sa podobné batérie zvyčajne správajú.

That is why the number can jump around strangely, dropping fast in cold weather or staying stuck at one percent for far longer than expected. The battery itself is not broken. The phone is only guessing, as carefully as it possibly can, and updating its guess every few seconds.

Preto to číslo môže čudne poskakovať, v mraze rýchlo padať alebo trčať na jednom percente oveľa dlhšie, než by si čakal. Samotná batéria nie je pokazená. Telefón len háda, tak starostlivo, ako len vie, a svoj odhad prepisuje každých pár sekúnd.