Power Bank: Battery Reserve

Power Bank keeps a battery reserve that your phone can't spend by accident.

Deposit part of your charge, for example 20%, and Power Bank shows only the rest: in the status bar, in the notification, on the widget and in the floating bubble. You use your phone as if it had less battery left. When you really need it, release the reserve and the percentage jumps back up. No more low battery anxiety on the way home.

Power Bank does not create energy and does not change your real battery. It changes the number you look at, and that changes how you use your phone. Unlike a classic battery saver that only tweaks settings, it helps your battery last longer by changing your habits.

HOW IT WORKS
• Deposit: move 5%, 10% or any amount of charge into the reserve.
• Use your phone: the status bar shows the lower, spendable battery percentage.
• Release: get the reserve back with one tap from the app, the notification, the widget or a Quick Settings tile.
• Safety net: if your free charge runs out, the reserve is released automatically, so you are never stuck with a phone that says 0%.

INCLUDED
• Battery reserve with deposit and release
• Battery percentage in the status bar, with an ongoing notification and quick actions
• Estimated time left, learned from how fast your phone actually drains
• Low battery warning and automatic release
• Step-by-step guide to hide the system battery icon on Samsung, Pixel, Xiaomi, OnePlus and other phones
• Small home screen widget
• Light, dark and system theme, English and Hungarian
• Statement for the current month

POWER BANK PRO
A one-time purchase unlocks the whole bank. You can try every Pro feature for 12 hours after installing.
• Up to 5 vaults: separate reserves such as Travel, Emergency or Evening
• Term deposits: lock a vault until a set time, or until your charge drops to 10% or 5%
• Standing orders: automatic deposits when you unplug the charger, on a schedule, at 100%, or "pay yourself first" while charging
• Floating battery bubble, or the bubble and the notification together
• Time left shown right in the notification
• Full statement history: every month's receipt with deposits, releases, broken locks and how many times the reserve saved you
• Wide widget with deposit and release keys
• Quick Settings tiles

DESIGNED LIKE A DEVICE
Seven-segment LCD digits, a cell-by-cell battery gauge and keys that feel like real buttons. Hold-to-break locks make you think twice before spending your reserve.

WHO IT IS FOR
• Anyone who gets nervous when the battery drops below 20%
• Long days, commutes, travel, festivals and hikes far from a charger
• People who want to spend less time on their phone
• Anyone who wants an emergency battery reserve for calls, maps or tickets

PRIVACY
No account, no ads and no tracking. Your reserve, history and settings stay on your phone. Permissions are only used for what they are named for: notifications for the status bar indicator, display over other apps for the optional bubble, and starting after reboot so the indicator comes back.

GOOD TO KNOW
• Android always draws its own battery icon. Power Bank shows how to hide it in your phone's settings. On some phones this needs a one-time ADB command, which the app explains and lets you copy.
• Power Bank uses very little power: it only reacts when the battery level changes.