Why does my Android phone stop charging at 80

I have had my moto e phone for 6 years. I have always kept my phone between 20-100% charge. Always charge to 100%. Maybe some batteries are different than others. Never had a problem with the battery yet.

Hi Kram. Its okay to charge your phone at 70%. As a general rule of thumb, just avoid prolonged charging at 100% or letting it drop below 20%. If you prefer a healthier routine, keep the battery between 20% 80% (unless for calibration when needed).

Hello James,

Happy to hear you find our article useful.

To answer your questions:
1. Yes, fast charging will reduce batterys life span. Its recommended to only use it when youre in a rush.
2. Yes, the 20 80 routine is always recommended. You can always charge to 90% or higher if you know you might need to use your smartphone for a while without having access to a charger.
3. Yes, however, do make sure you turn on the battery protection features. And if possible, use a slower charger.

Hi. That is true. However, standard USB ports are rated for 10,000 mating cycles. Its very likely to outlast the longevity of a phone (or its battery). Though in practicality, there are many factors that also affect the ports longevity.

Do you mean that your battery discharges faster sometimes? ​
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​You could check if any intensive background apps are running. Also, uninstall unnecessary apps and update your apps frequently; some updates might fix issues of app draining unnecessary processing power. If it persists, consider calibrating your phone battery. And if it remains so, you may consider backing up your data and formatting your phone (try at your own risk). ​
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​Should all the above fails, the battery might need replacing. Hope these info helps, and let us know your result.

Hi David. Thanks for the words of encouragement! Were happy to know this article is helpful to you.

Hi. You can top up your battery whenever convenient. However, its best not to let it drop below 20% too often (unless for the occasional battery calibration).

Hey. Its not so much as damaging your battery as it is stressful for it. However, fast charging also generates more heat, which is detrimental to battery (take note if youre gaming or using a thick phone case while charging). On the other hand, charging frequently wont harm your battery. But if 40 80 is too inconvenient for you, you may consider a less stringent routine.

Hey. Charging frequently wont harm your battery. Rather, it is the high or low state of charge that is stressful for the battery. We recommend not letting your battery go below 20% as a habit (unless when calibrating).

Hello. One full cycle (from 100% to 0%, not necessarily in one go) isnt usually completed in a day.

Hello Amoochi. You may try calibrating your battery with the steps below instead:

1. Charge it to 100% then unplug & let it rest for 1 hour.
2. Then, use your phone normally until it drops to 10% or 0%.
3. Rest the phone again for 1 hour.
4. Finally, charge it back to 100% again.

The routine can be done once per month. Though you may hold off the calibration until the battery reading starts getting inaccurate again.

Hi Clloyd. The most recommended routine is 20% 80%. Unplugging at 90% is fine too, though not as healthy as 80%. But as smartphones are meant to convenience us, you could find a balance between convenience and battery health. And for your last question: charging your phone frequently is perfectly healthy. If anything, deeper discharge stresses the battery.

I always charge my phone once everyday when it going 40% then i charge to 100% is that okay ? One more question can i use powerbank to charge when i sleep overnight ?

Hi there! You can top up at any % as frequent charging will not harm your battery. Just dont let it go below 20% often.

Hi admin, my new phone came up with a fast charger 30W Flash Charge 4300mAh Battery, you said that fast charger is not good for the batterys health how would I maximize my batterys life span?

Hi Ninad. Its okay to top up at 45%. Although charging to 100% isnt as healthy (as say, around 80%), you should at least not let it charge at 100% for long hours.

Hey there. In terms of Depth of Discharge (DoD), the 20 80 routine with a 60% DoD does grant a little more discharge cycles than a 65/70% DoD routine. However, considering that smartphone is a tool to provide us convenience, you could find a balance between battery health and convenience in your daily life. Other ways to prolong battery are to limit the exposure to high heat and fast charging.

For calibration, there isnt any recommended interval. You can do it whenever you feel the battery reading is inaccurate OR when the phone isnt used for a long time.

Hi there. For your situation, it may be better to leave it at 80%. Because certain instances might drain your battery down to an undesirably low level before you wake up. For example, sudden dip in network signal that leaves your phone actively searching for signal, or getting a phone call that vibrates your phone for too long (vibration motor drains battery). If you are storing the phone for an unusually long time (days, weeks, or months), its alright to charge it from 45% to 50%. Frequent charging will not harm your battery.

I have new phone realme 5i which has 5000mA battery and 10watt charger. Realme website says Charge your phone when your battery level goes down to 10%.But I find in internet that I should star charging my phone when it is 30-40 % . Which % should I really star to change my phone for battery long life?

Hi Tushar, it is important to differentiate between overcharging and prolong charging at high battery level (e.g. 100%). Overcharging is charging your phone battery until it reaches a level that something dangerous can happen (e.g. battery explosion). No worry on overcharging as most smartphones nowadays can prevent overcharging (however there is no guarantee as we dont represent any one of so many phone manufacturers out there). Prolong charging at high battery level (e.g. 100%) on the other hand, in simple is charging for too long, where you are constantly exposing your phone battery at extreme battery level, which is not dangerous, but can cause stress and reduce your battery lifespan. Hence, to improve your battery lifespan, you can practice the 20 80 rule, however not everyone can do that, due to different phone usage scenarios we are in, so charging to 100% once in a month is fine too as your phone might need calibration (refer to our article for more detailed information). Hope this help, cheers!

Hi Ragnister, your first idea, following the 20 80 rule might be a better choice. Turning off at >= 50% and turn on otherwise, might result in too frequent on and off, which could potentially generate some heat from the phone due to certain processes (such as charging protocol detection and selection) are need for the phone to start charging and stop charging, at the same time, the electronic circuit of the phone might potentially wear off due to excessive on and off within a very short period of time.

p.s. Having a Raspberry Pi, and being able to control it, good effort and keep it up! And if you want, you could update us your progress too, someone else in the community might be interested to know too.

Hi Karla, your charging behavior is fine, as it avoids low battery level which can harm your battery. Remember to also avoid your phone stay charged for too long at 100%.

Hi Aryan, the advantage of charging when your phone is off, is that you can charge your phone faster and less heat is generated from your phone running certain applications and processes. However, you can obverse whether does your phone actually generate less heat when you charge with your phone off versus just screen off, as varying from phone to phone, most phone nowadays are intelligent enough to reduce processing when your phone screen is off, thus reducing heat generation. So if you notice there is no difference in heat generation, you could just charge your phone with screen off, without needing to turn it off entirely.

Hi xgall, 30 40% to 80 85% and 50-60% to 85%, both are fine, as both methods avoid your phone battery from exposing to extreme battery levels.

Hi Mousa, glad to hear that!

Hi Robert, we do not recommend leaving your phone stay charged for too long at 100%, as it can reduce your battery lifespan.

p.s. You could consider getting our Charby Sense auto cutoff cable, to help stop your charging automatically when your phone is fully charging, so you can have a healthier battery.

Hi Tom, exposing your phone battery to extensive heat and also fast charging can reduce your battery lifespan. If you have no choice to charge your phone while using the navigation app, try to avoid your phone from exposing to direct sunlight, placing your phone in front of the air vent could help bringing down the phone temperature and using your non-fast charging charger is a good choice too. The other thing you could is to follow the 20 80 rule.

Hi Michael. Yes, you can. Its healthier than charging all the way to 100%.

Hello there. Charging frequently will not harm your battery. If anything, allowing your battery to drop extremely low is bad for battery life.

Hi Jack. Thats good for your battery.

Hey Ankur. You can find a balance between convenience and longevity. It is better than charging all the way to 100%.

Hi Ajay. Yes, thats healthy for your battery.

Hi Arun. Yes, its best not to let your phone drop to 0%. Consider recharging it before it drops below 20% for optimal health. On the other hand, if you really need it at 100%, make sure you do not leave it charging at max battery for too long (e.g., overnight charging).

Hey Shylee. Thats fine. Though you may need to calibrate the battery once in a blue moon (when you feel the displayed % isnt reflecting the actual %).

Hi Carlo. Yes, its still considered healthy. Better than 0-100, and any variants that are closer to 0 and 100.

Hey Myca. It has more to do with the property of lithium-based batteries: that it gets stressed when close to 0% and 100%, and the least when near 50%. With that in mind, you can find a range that is most convenient for you. On the other hand, topping up your battery frequently isnt harmful. If anything, charging when your battery gets too low is harmful.

Hello Benjamin. 20 99 is healthy too, though not as healthy as 20 80. The closer the % is to either extremes, the more stressed it (lithium-based battery) is.

Greetings Travis. Most phones have in-built sensors to provide data on battery. It is a matter of whether the app developer can utilize those data wisely. That said though, we could not comment on the app itself. Instead, you can test whether or not your battery will drain faster with the app, as its frequently running in the background.

Hello Queen. That is better than charging it from say, below 20% to 100% all the time. Though battery level near 100% is relatively more stressful for the battery, you shouldnt experience drastic degradation so long as you dont keep it at 100% for long hours.

Hello JayJay. May we know which device(s) you are referring to?

Hello John. Though fully discharging is harmful, it shouldnt affect the battery health significantly since its not done frequently. So it is okay for calibration once in a while.

Hiii, i bought Redmi note 8 does 20-80 Rule apply? :>

Hi Jacob. Not letting the battery fall below 20% sounds great. On the other hand, although charging all the way up to 100% isnt as healthy as the lower %, you shouldnt experience drastic degradation if you dont consistently charge overnight.

Hi Shehroz. Your battery shouldnt experience drastic degradation unless you often charge it overnight / 100% for extended period. Stopping the charging earlier as you did is helpful too.

Hello Kimberly. It boils down to personal preference (and convenience) because battery degradation is inevitable. What we can do is to minimize the deterioration; the healthiest battery level is around 50%, which is highly impractical. The only time you would leave your battery at 50% is if youre storing it unused for a long period.

The closer the % is to 0% and 100%, the higher the stress. That said though, youd still benefit from better battery life if you avoid the extremes: i) leaving it charging at 100% for too long and ii) letting battery drop too low frequently (worst is letting battery die).

Hello Aye. Sure you can. If you need a longer runtime, you can still protect your battery by not letting the battery drop too low (or plugged to a charger for too long after 100%)

Hey Ian. Yes, you can do the same for your Huawei Mate 30 Pro.

Hello. You can definitely charge in between the percentage. Charging frequently is more beneficial for lithium-ion batteries. Just minimize the times your battery goes near to 0% and 100%.

Hi Zain! Its true that the displayed 100% isnt the batterys true max limit (to protect the battery from extreme stress); but its unlikely to have such large difference (like 80%) since phone battery has a small capacity. This practice (setting the max limit to 80%), however, is applied to Electric Vehicles battery. Which is to say your phone battery will still benefit from avoiding full charge.

In terms of battery health, its not advisable to use battery-heavy apps while charging as it generates heat that will degrade the battery more.

Hello Abwao. Sure you can. Theres no problem with that.

Good day, Ekemini. We cant predict your batterys longevity as there are many factors in play. But generally:

1) Its the extreme battery levels that are harmful for lithium-ion batteries. Say, levels closer to 0% and 100%. So topping it back up at 20% still helps with battery health. Charging to 100% does stress the battery. But if you want more runtime in a day, you can at least unplug when it reaches 100% to prevent greater stress on it.

2) On the contrary, charging frequently is less stressful for Li-ion batteries. A deeper discharge/charge is instead stressful for them. So top up whenever convenient.

Happy to be of help to you =D

Hello Eric. Smartphone batteries do not limit the charge and discharge threshold like EV batteries (25% 85%). However, the 100% and 0% of a phone battery are not its absolute limits; going to true 0 and 100 will be extremely stressful for lithium-ion batteries. Though the difference isnt significant.

Thats fine too, if thats more convenient to you. It will still be beneficial (to the battery) compared with more extreme battery ranges (e.g., 10% 100%, etc)

Hello there! Playing resource-intensive games definitely affect the battery, in that they heat it up. Our recommendations:

1) Avoid charging while playing as it will generate more heat that degrades the battery.
2) If charging/playing does heat up your phone significantly, you can remove the casing (if any) to help with heat dissipation.
3) Avoid from letting the battery level drop too low (say, below 20%).

Hey there! Yes, the rule applies to the type of battery now used in smartphones rather than the phones themselves.

Hi there! Yes, the same rule applies. And for 1st charge, we recommend that you discharge to 1%/2% battery level instead of a full discharge.

Hey Richu. It isnt a must to charge 8 hours for the first time; instead, do these:

1. Charge it to 100% then continue for another 2 hours; (Total of 4 hours)
2. unplug, and rest your phone for 1 hour;
3. use it normally until battery drops to 10% or lower;
4. rest it again for another 1 hour;
5. finally, recharge to 100%.
**Can repeat this routine once a month for battery calibration

For daily battery care, avoid going past 80% and below 20% battery levels, which stress the lithium battery more. (Tighter range is less stressful.)

Hello Ellen. Charging frequently doesnt harm lithium-ion batteries. Partial discharge/charge is actually less stressful for batteries now, which do not suffer from memory effect. Whats harmful, however, is leaving it on charger after full charge: maintaining a high battery level for prolonged duration degrades battery capacity.

About phone cleaners: yes it does help; however, features such as clearing cache/junk and RAM are already present in modern Android devices. That said, its not necessary to have an extra app for the purpose, which occupies extra space and consumes more battery.

Hello Piet. We dont recommend doing so as there have already been numerous reports of related incidents. However, its important to note that the causes of explosions are not conclusive (in that charging while using may not be the direct cause). Still, safety above all.

Hello hervé. It may be due to that S9+ has a higher consumption rate. Its not as harmful to fully charge it, as long as you dont consistently leave it on 100% for too long. Regarding the inaccuracy in capacity rating, you could try doing a full discharge once to recalibrate the battery. Hope this helps!

Hello Patrick. Keeping your phones battery in 20% to 80% (or narrower) range will help slow down battery degradation. But if you prefer charging to 100% for longer runtime, avoid leaving it at full battery for too long (i.e., keeping it plugged to the charger after 100%).

Hello Hugo. Yes, it does lower battery capacity in the long run. Lithium-ion batteries are degraded more the longer they stay at extreme battery levels.

You can look for auto cut-off cables or plugs, whichever is more convenient for you.

Hello there! Frequent charging does not harm lithium-ion batteries. They suffer stress on deeper/full discharge and when they are in extreme battery levels (above 80% and below 20%). So its safe to recharge whenever convenient, just unplug when the battery is full or when its at least 80%.

Hello William. It is not necessary. What turning off the phone does, as with flight mode and turning off the screen, is reducing the battery usage to lower the time itll take to charge.

No reason to turn it off.

Hello there! You can charge your phone whenever you need. But for maximizing its battery lifespan, try to maintain it in the 20% 80% battery level range. If not, just make sure you dont leave your phone charging for too long after its fully charged.