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.

Angka baterai itu cuma tebakan. Tandai teman yang panik di sepuluh persen. Ponselmu menampilkan persentase baterai, angka yang rapi dan tampak pasti, duduk di pojok layar. Rasanya seperti fakta yang polos.

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.

Itu bukan pengukuran langsung. Tidak ada cara sederhana untuk membuka baterai dan membaca berapa daya yang tersisa di dalamnya. Sebagai gantinya, ponsel memeriksa tegangan dan aliran listrik yang bergerak lewat baterai, lalu menjalankan angka-angka itu melalui program kecil yang memperkirakan sisanya, berdasarkan perilaku baterai sejenis pada umumnya.

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.

Itulah sebabnya angkanya bisa melompat aneh, turun cepat saat cuaca dingin atau bertahan di satu persen jauh lebih lama daripada dugaanmu. Baterainya sendiri tidak rusak. Ponselmu hanya menebak, sehati-hati mungkin, dan memperbarui tebakannya setiap beberapa detik.