ROG Ally X: How to Look After the Battery
Battery longevity is driven by heat and time spent at extremes of charge, not by how often you plug in.
Last revised
Why this matters
Lithium cells age chemically. The rate of that ageing roughly doubles for every ten degrees Celsius of sustained temperature increase, and sitting at a full charge accelerates it further.
What you will need
- The manufacturer charger or a reputable equivalent
- Somewhere cool to charge
- Optionally, a charge-limit setting if the device offers one
Step by step
- Enable any optimised or adaptive charging option the device provides.
- If a charge limit of 80 or 90 percent is offered, use it unless you regularly need full capacity.
- Remove thick cases while fast charging, which traps heat against the cell.
- Avoid charging in direct sunlight or a hot car.
- Check the reported battery health figure every few months and note the trend rather than the absolute number.
How often
These are habits rather than tasks. Check battery health quarterly.
Specific to the ROG Ally X
Bear in mind that windows on a handheld is still a poor fit, which is worth factoring into how carefully you approach this.
Before you start
- Set aside enough time to finish — a job abandoned halfway is worse than one never started
- Work somewhere well lit and uncluttered, with a container for anything that comes off the device
- Take a photograph before you change anything, which costs seconds and saves guessing later
- Check whether the Asus warranty still applies, because it changes which steps are worth doing yourself
How long it takes
Budget ten minutes the first time and half that afterwards. It is the kind of job that takes longer to schedule than to do, which is exactly why it gets skipped — put it on the same recurring reminder as something else you already do.
Signs you have left it too long
- It takes noticeably longer to do something that used to be instant, and a restart only fixes it briefly
- It runs warmer than it did under the same load, in the same room, at the same time of year
- The behaviour you already know about — windows on a handheld is still a poor fit — starts showing up earlier in the day than it used to
- You have begun working around it without deciding to, which is usually the first real symptom
What not to do
- Leaving it at 100 percent in a hot environment for long periods
- Running to zero regularly, which stresses the cell
- Cheap unbranded chargers with no protection circuitry
- Third-party battery replacements of unknown origin
Behind this page
This reference page is written from the same testing notes as the reviews it supports, and it is revised whenever the hardware or the software underneath it changes. Where a figure appears here it has been measured rather than quoted from a specification sheet.
If something on this page no longer matches what you are seeing, it is out of date rather than disputed — tell us and it gets checked again.
Related reading
The reviews this page supports go into the measurements behind these figures, and the knowledge base collects every reference page we keep.
Elsewhere in maintenance: ROG Ally X: How to Prepare It for Sale or Handover, ROG Ally X: How to Protect Your Data on It and ROG Ally X: How to Reduce Its Power Consumption.