Does 5G drain your battery faster than 4G? When to switch it off
Early 5G phones earned a reputation for chewing through batteries. Modems are better now, but there are still places where switching 5G off makes a real difference.
Where the extra drain comes from
- Hunting on a weak signal. Any phone radio uses more power when the signal is poor, because it transmits louder and retries more. 5G's faster bands reach less far and get through walls less well, so the edge of coverage is closer, and a phone on the edge keeps scanning and handing over between 5G and 4G.
- Two connections at once. Many networks launched 5G as non-standalone: the phone keeps a 4G connection for control and adds 5G for data. Standalone 5G, which some networks now offer, removes that overlap.
- Doing more because it can. Faster data lets apps load higher-quality video and bigger feeds, which is more work for the screen, processor and radio, and more data used.
- Older modems. The first 5G phones (around 2019–2020) used noticeably more power; recent modems are much more efficient.
How to tell if 5G is the culprit
| Sign | What it suggests |
|---|---|
| The icon keeps switching between 5G and 4G/LTE | You're on the edge of 5G coverage; the phone is hunting. Most likely to save battery by turning 5G off here. |
| Battery settings show high “mobile network” or “cell standby” use | The radio is working hard, often because of weak signal (5G or not). |
| Phone warm in your pocket while idle | Constant searching or a background upload; check both. |
| Strong, steady 5G and normal battery | Leave it on; downloads finish sooner, and a radio that finishes quickly can go back to sleep sooner. |
The settings
- iPhone: in the Mobile Data options, Voice & Data offers 5G On, 5G Auto and LTE. 5G Auto uses 5G only when it gives a clear benefit; LTE turns it off. Low Power Mode also limits 5G for most tasks.
- Android: in the SIM or mobile network settings, Preferred network type lets you choose LTE/4G instead of 5G. Some phones have their own adaptive 5G option that does this automatically.
- Weak signal everywhere at home? Wi-Fi calling and staying on Wi-Fi save more battery than any 5G setting.
Fair test
Battery use swings a lot with screen time, so compare two similar days: one on 5G, one on LTE, in the same places. If you can't see a difference, 5G isn't your problem; look at the per-app list instead. The overnight drain guide covers the usual suspects.
Related
Wi-Fi vs mobile data: which uses more battery? · What airplane mode turns off · Battery drains faster when travelling · Overnight battery drain · Mobile data running out fast · Power bank calculator
Questions
Does 5G drain the battery more than 4G?
It can, mostly where 5G signal is weak or patchy and the phone keeps searching and switching, and on networks where 5G runs alongside a 4G link. On a strong signal with a recent phone the difference is small.
Should I turn off 5G to save battery?
If the 5G icon keeps flicking on and off where you spend most time, yes; choose 5G Auto on iPhone or LTE as the preferred network type on Android. On a strong, steady signal there's little to gain.
What is 5G Auto on iPhone?
A setting that uses 5G only when it makes a clear difference, such as big downloads, and otherwise stays on LTE to save battery.
Why does my phone get warm on 5G?
Usually because it's working hard on a weak signal or moving lots of data. Move to Wi-Fi or switch to LTE and see if it cools down.
Published .