The Fold8 has a typical capacity of 4800 mAh, and the Ultra has 5000. The multi-device battery monitoring app “Maqbis” helps you understand battery health and drain, compare charging power, duration and temperature, improve your habits and track the battery from another Android phone.
A foldable can be a compact phone for calls one moment and a screen for work or watching video the next. This versatility makes how you use the battery more important than its capacity figure alone. To look after your Fold8, start by identifying your model, then manage charging and monitor temperature in a way that suits your day.
What are the battery capacities of the Fold8 models?
These are the figures for the two Fold8 models in the official sources we reviewed:
| Model | Typical capacity | Rated capacity | Samsung’s advertised video playback |
|---|---|---|---|
| Galaxy Z Fold8 | 4800 mAh | 4660 mAh | Up to 26 hours |
| Galaxy Z Fold8 Ultra | 5000 mAh | 4854 mAh | Up to 27 hours |
Sources: Samsung battery support and official specification footnotes.
Typical capacity is the estimated average capacity of a sample of batteries of the type used in the phone model. Rated capacity is a value the manufacturer declares according to a measurement standard. The two figures can therefore differ without indicating a problem with your battery.
Storage capacity is a separate matter. Paying more for room to store files and photos does not automatically mean a larger battery within the same model; the specifications we reviewed do not advertise an increase in battery capacity based on storage. Check the model name and number when comparing versions sold in different markets.
Flip8 belongs to a different phone category, so it is not included in the table as a Fold8 version.
Will the battery give you the advertised runtime every day?
The video figures come from specific test conditions. Samsung explains that the network, brightness, settings, battery condition and other factors affect the result. Hours of video playback therefore do not equal hours of gaming, taking photos or navigating with your phone’s maps. Source: test conditions in Samsung’s specifications.
It is more useful to understand your own pattern: does the phone run out of charge only on workdays? Does drain increase when you use the inner screen? Does it get hotter when you play games while charging? These observations help you choose a change that makes a difference, instead of disabling features you need without a clear reason.
How do you protect the battery through Samsung’s settings?
Start with Settings, then Battery, then Battery protection. Choose the mode or charge limit your device offers; the details vary by model and system version. The aim is to reduce the time the battery stays full when you do not need a full charge. Source: Samsung’s explanation of protection.
If you work near a charger, try a lower limit that suits your day. On a long travel day, you may need a full charge. No single percentage works for everyone, and a limit that leaves you out of charge before you finish your work is no help.
Heat deserves particular attention: keep the phone out of direct sunlight and hot cars, and ease off activities that heat it up while charging. To reduce battery drain, start with brightness, screen timeout and power-hungry apps. Source: Google’s Android guidance.
How can the multi-device battery monitoring app “Maqbis” help?
When your Fold runs out of charge faster than usual, you need to know what changed: did you use the screen more? Did drain increase while the phone was idle? Or has the battery started holding less charge over time? The multi-device battery monitoring app “Maqbis” brings together indicators for charging, drain and battery health, and shows how they change, so you can choose the right next step based on what is happening on your phone.
Understand battery health as well as charge level
Charge level tells you how much is left to use right now. Battery health gives you a picture of its ability to hold charge compared with when it was new. Looking at estimated current capacity, battery health and their trends together helps you distinguish a day of heavy use from a sustained decline in battery capacity.
This tracking matters for a phone you want to keep for years: instead of judging its battery from a single day, you can see the trend over time, assess the effect of your charging habits and make a better-informed decision about replacement.
See where your charge goes during the day
The multi-device battery monitoring app “Maqbis” shows drain over the last 24 hours, screen-on time and the rate at which charge drops during active use and idle periods. This detail is particularly useful for a Fold: you can compare a day spent using the inner screen with a day of lighter use and see the difference in the drain rate.
If you notice a large drop while the phone is idle, you know background activity and the network are worth checking. If the drop is concentrated in screen-on periods, start by reviewing brightness and usage time. Comparing efficiency between weeks also helps you see whether drain is improving or increasing over time.
Plan charging before you need it
Alongside the current percentage, the multi-device battery monitoring app “Maqbis” estimates the time remaining until you need to charge and the time to full while charging. Before going out, this helps you judge whether to plug the phone in now; while it is charging, you can plan your time instead of checking the percentage every few minutes.
Compare charging performance based on what reaches your battery
Charging power, session duration and progress tell you how your phone charges in practice. Charging details let you review previous sessions and compare normal performance, rather than relying solely on the charger’s printed rating.
Current and voltage readings also help you understand energy flowing into or out of the battery. The displayed charging power is an estimate of charging power at the battery and may differ from the charger’s advertised rating. If charging becomes slower than usual, reviewing charging power, temperature and battery percentage gives you a starting point for investigating the cause, such as changing the cable or checking charging conditions.
Notice temperature during use and charging
The current temperature, its trend and the highest temperature recorded during a charging session help you spot when heating recurs. You can compare charging while the phone is idle with charging while gaming, then adjust the habit associated with higher temperatures. A high-temperature alert draws your attention at the right time.
Improve your charging habits over time
The multi-device battery monitoring app “Maqbis” shows how often you charge, your usual charging times and how long the phone remains plugged in after reaching full charge. These indicators can reveal, for example, that you leave the Fold fully charged on the charger for long periods, helping you use Battery protection in Samsung’s settings or a full-charge alert to manage that habit.
By reviewing these habits alongside battery health and efficiency, you can track the effect of a change: are you charging at more suitable times? Is the phone spending less time fully charged on the charger? Has drain improved over the week?
How do you track your Fold’s battery from another phone?
This is useful when you leave the phone charging in another room and carry a second Android phone. Sharing through the multi-device battery monitoring app “Maqbis” depends on the app, accounts and consent, rather than both phones being from the same brand.
- Install the app: on the phone whose battery you want to track and on another compatible Android phone, and sign in to the relevant account on each device.
- Create an invitation: from the Share my phone’s battery option on the device whose battery you want to track.
- Accept sharing: open the invitation link or scan the code from the other phone, then accept in the app.
- Check the readings: open the shared battery and check the last update time and charging status before relying on the displayed level.
After sharing, you can open your Fold’s battery details from your other Android phone and track charging, temperature and drain while away from it. This is useful when you leave it on the charger, rely on two phones during your day or want to help a family member keep track of their battery.
The last update time lets you know how recent the reading you are viewing remotely is. This brings together Samsung’s charging protection and an understanding of your battery’s performance through the multi-device battery monitoring app “Maqbis”, whether you are carrying the Fold or tracking it from your other phone.
Frequently asked questions
What are the battery capacities of Fold8 and Fold8 Ultra?
Typical capacity is 4800 mAh for the standard model and 5000 for the Ultra. Samsung lists a rated capacity of 4660 for the standard model and 4854 for the Ultra.
Does the battery differ by storage capacity?
The specifications we reviewed list battery capacity by phone model and do not mention a larger battery for a higher-storage version of the same model. Check the model number of the version sold in your country.
Can I view my Fold’s battery from another phone?
The multi-device battery monitoring app “Maqbis” lets you share battery readings between compatible Android phones after installing the app and accepting an invitation. A connection and updates from the phone you are tracking are required.
How do I combine Samsung’s protection with the multi-device battery monitoring app “Maqbis”?
Set the charge limit through Battery protection in Samsung’s settings, and use the multi-device battery monitoring app “Maqbis” to track battery health, drain, temperature and charging performance over time.
