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Mine arrives tomorrow and I really don't want to leave the battery charging for 12 hours before I start playing with it. The quick start guide says that it'll be fully charged after 3 hours - will I degrade the battery if I only charge it for 3 hours the first time?
itm said:
Mine arrives tomorrow and I really don't want to leave the battery charging for 12 hours before I start playing with it. The quick start guide says that it'll be fully charged after 3 hours - will I degrade the battery if I only charge it for 3 hours the first time?
Click to expand...
Click to collapse
it is reccomended but not manditory. i'd suggest use it out the box as is just make sure that your initial charge is for 12 hrs. mine came almost fully charged so i was able to have a good play when i got it. when i did charge for the 1st time it was for 12 hrs.
Usually you're supposed to use a device until it's dead or close to it before charging it the first time.
phuKKah said:
Usually you're supposed to use a device until it's dead or close to it before charging it the first time.
Click to expand...
Click to collapse
The long duration charge is old recommandation for NI-MH batteries. For the New Li-ion when your phone stops charging, it'is finished because the phone cuts automatically the charge. You can unplug the phone and use it...
If you read scientific articles about battery technologies you will find the following:
- Li-ion is instable charging technology that why inside the battery there is a charge controler
- Never discharge completely the battery. If the internal control circuit is not powered the charge after will destroy the battery. That why generaly your phone power off arround 5 and 10% of charge.
- Half charge is considered as half cycle: if the battery has 1000 cycles = 2000 x 1/2 charge.
- Best storage condition: Half charge after full charge and half discharge. Battery storage doesn't like hot conditions. Fresh and not wet conditions.
My Wizard has more than 4 years and I uses the original battery... the battery life is perfect...
Ps: I have a Sony NW-A808, I changed the battery because the player did not keep the charger (3 day after the full charge It was empty). With the new battery it's the same... I discovered an Hardware/Firmware problem...
Hi fellas..
Maybe you've noticed the messages I've sent to Unofficial BravoS thread of Coolexe's (http://forum.xda-developers.com/showthread.php?t=1200517&page=51) which is the ROM I use.
The issue is, the battery discharges rapidly. Actually, if you check mV values, it doesn't discharge rapidly, but if you look at percentages, there is a huge inconsistency. I used Battery Monitor Widget to log the battery performances last night, and saw these horrible results:
Code:
2011/09/19|04:59:49|-515mA|37%|3581mV|40.2ºC|1|0
2011/09/19|05:00:51|-465mA|36%|3576mV|40.2ºC|1|0
2011/09/19|05:01:49|-460mA|36%|3576mV|40.2ºC|1|0
2011/09/19|05:02:50|-462mA|35%|3517mV|40.2ºC|1|0
2011/09/19|05:03:49|-477mA|35%|3517mV|40.2ºC|1|0
2011/09/19|05:04:50|-471mA|34%|3449mV|40.3ºC|1|0
2011/09/19|05:06:06|-478mA|0%|3415mV|40.5ºC|1|0
2011/09/19|05:06:08|-478mA|0%|3415mV|40.5ºC|1|0
These are the last lines of the log, before the phone shuts down. As you can see, the phone gone to 0% from 34% in one minute! No low battery warnings or whatsoever..
Funny thing is, this doesn't happen in StarBurst ROM (which is a Froyo based one). Do you reckon this is a GingerBread issue or something? I saw some other people complaining about their phone shutting down at 20% as well.
So, what do you suggest?
when you look at the voltage there isnt that much drain, so its only a displaying problem
wipe battery stats and maybe recalibrate the battery
but first one should fix it
cheers
ps: i just checked, my desire is at 18% with 3.693mV, now you see the differance
crendot said:
when you look at the voltage there isnt that much drain, so its only a displaying problem
wipe battery stats and maybe recalibrate the battery
but first one should fix it
cheers
ps: i just checked, my desire is at 18% with 3.693mV, now you see the differance
Click to expand...
Click to collapse
This is what I've done so far:
Drained battery to 0% (log above) and charged it a little bit while powered off (like 20%). Turned on the phone, and obtained those logs (last lines only):
Code:
2011/09/19|14:41:25|-268mA|10%|3644mV|38.1ºC|1|0
2011/09/19|14:42:25|-267mA|10%|3644mV|38.1ºC|1|0
2011/09/19|14:43:25|-270mA|10%|3644mV|38.1ºC|1|0
2011/09/19|14:44:25|-269mA|9%|3644mV|38.1ºC|1|0
2011/09/19|14:45:25|-267mA|9%|3644mV|38.1ºC|1|0
2011/09/19|14:46:25|-268mA|9%|3644mV|38.1ºC|1|0
2011/09/19|14:47:25|-266mA|8%|3644mV|38.1ºC|1|0
2011/09/19|14:48:25|-267mA|8%|3644mV|38.1ºC|1|0
2011/09/19|14:49:25|-269mA|7%|3640mV|38.0ºC|1|0
2011/09/19|14:50:25|-267mA|7%|3640mV|38.0ºC|1|0
2011/09/19|14:51:25|-266mA|7%|3640mV|38.0ºC|1|0
2011/09/19|14:52:25|-267mA|7%|3640mV|38.0ºC|1|0
2011/09/19|14:53:25|-267mA|6%|3640mV|38.0ºC|1|0
2011/09/19|14:54:25|-267mA|6%|3640mV|38.0ºC|1|0
2011/09/19|14:55:25|-267mA|5%|3635mV|38.0ºC|1|0
2011/09/19|14:56:25|-266mA|5%|3635mV|38.0ºC|1|0
2011/09/19|14:57:25|-267mA|5%|3635mV|38.0ºC|1|0
2011/09/19|14:58:25|-268mA|5%|3635mV|38.0ºC|1|0
2011/09/19|14:59:25|-268mA|4%|3630mV|38.0ºC|1|0
2011/09/19|15:00:25|-319mA|4%|3630mV|38.0ºC|1|0
2011/09/19|15:01:25|-268mA|4%|3630mV|38.0ºC|1|0
2011/09/19|15:02:25|-270mA|3%|3610mV|38.1ºC|1|0
2011/09/19|15:03:25|-269mA|3%|3610mV|38.1ºC|1|0
2011/09/19|15:04:25|-270mA|2%|3586mV|38.1ºC|1|0
2011/09/19|15:05:25|-273mA|2%|3586mV|38.1ºC|1|0
2011/09/19|15:06:25|-273mA|2%|3586mV|38.1ºC|1|0
2011/09/19|15:07:25|-273mA|2%|3586mV|38.1ºC|1|0
2011/09/19|15:08:25|-289mA|1%|3513mV|38.3ºC|1|0
2011/09/19|15:09:25|-290mA|1%|3513mV|38.3ºC|1|0
2011/09/19|15:09:51|-290mA|0%|3464mV|38.3ºC|1|0
It seems more "smooth" discharge now. Right now, I'm charging my phone off; going to turn on phone once it reaches "green light" with charger on, and plug it off once phone booted. Maybe then, it can know what's maximum and minimum.
So far, I tried to charge my phone to full and erase batterystats.bin but, as you can see at the first post, it didn't work well.. On the other hand, the phone charged-discharged only once in this ROM, you think it could be better if I've given a "second chance"?
i dont know much about that "battery calibrating" and reseting stuff, you have to search in the forum
only thing i want to say is, dont do that deep drains!
recharge at least 5%! you kill your battery, lithium-ion batterys get serious damage from deep drains
crendot said:
i dont know much about that "battery calibrating" and reseting stuff, you have to search in the forum
only thing i want to say is, dont do that deep drains!
recharge at least 5%! you kill your battery, lithium-ion batterys get serious damage from deep drains
Click to expand...
Click to collapse
I know, but when phone thinks it's 30% and not warn me, how can I do it?
In order to calibrate the battery meter - FYI the battery itself cannot be calibrated, as Li-Ion batteries have a very low memory compared to old Ni-Cd etc. batteries - you have to go through the following procedure:
1) charge the battery to 100%;
2) let the battery discharge until the phone shuts itself down;
3) plug the wall charger into the phone, boot the phone up then charge the battery to 100% without interruptions.
If the above procedure does not yield the expected results, you can try fully charging the phone (LED showing green) with it completely turned off (after completely draining it). Again, the charging procedure should not be interrupted.
Source: personal experience - had to do this twice after installing new ROMs, as the phone was shutting down at ~14% (working like a charm now).
Regarding the matter of battery wear because of complete discharges, Li-Ion batteries do indeed have a lower cycle count than old-school batteries, but the standard charge/discharge number a Li-Ion battery can take is ~350, so you can't damage the battery pack by doing a full cycle per month (required to keep the battery meter accurate).
Good luck!
TVTV said:
In order to calibrate the battery meter - FYI the battery itself cannot be calibrated, as Li-Ion batteries have a very low memory compared to old Ni-Cd etc. batteries - you have to go through the following procedure:
1) charge the battery to 100%;
2) let the battery discharge until the phone shuts itself down;
3) plug the wall charger into the phone, boot the phone up then charge the battery to 100% without interruptions.
If the above procedure does not yield the expected results, you can try fully charging the phone (LED showing green) with it completely turned off (after completely draining it). Again, the charging procedure should not be interrupted.
Source: personal experience - had to do this twice after installing new ROMs, as the phone was shutting down at ~14% (working like a charm now).
Regarding the matter of battery wear because of complete discharges, Li-Ion batteries do indeed have a lower cycle count than old-school batteries, but the standard charge/discharge number a Li-Ion battery can take is ~350, so you can't damage the battery pack by doing a full cycle per month (required to keep the battery meter accurate).
Good luck!
Click to expand...
Click to collapse
Thanks for your answer...
Today I realized that it my concern was a quick one. Today, I discharged battery to 0 percent, plugged the AC charger while it's OFF and charged it for around 2h22m until Led-green-full; then turned on the phone with charger plugged and plugged it off just after the boot process. After that, I let the phone to discharge (I helped it a little )
I actually saw "Plug your charger" warning this time, and according to Bat. Mon. Widget, it gone down until 13%! If I do compare the mV values with the old ones, I can see that somehow the phone does learn which mV value correspond to which percentage better.
Even though it gone from 13% to 0% in two minutes, it's at least better than 30% to 0%.. Also, when I check the readings after I plugged in, I saw that percentage-voltage matching is slightly higher, showing that the phone now shows lower percentage for the same voltage - which shows that it learns percentage better.
After one or two charge-discharge cycle, I think it'll learn absolute 0
BTW; the battery says 3.4V 1400mAh and my maximum voltage is 4160mV (100%) and minimum is 3415mV (0%). Are these values normal, you think?
PS: What I'd recommend from anyone who loves flashing ROMs as much as I do is: AFTER YOU FLASHED A NEW ROM, CHARGE YOUR BATTERY TO FULL (100%) AND ERASE THE BATTERY STATS. AFTER THIS, NEVER, I SAY, NEVER ERASE YOUR BATTERY STATS FOR LONG TIME IN ORDER FOR YOUR PHONE TO LEARN STATS BETTER! Erase after long time, say 3 months for wear effects to be accounted, but well, I think you should be fine even after you don't do this
Maybe you did already know that, but, well, I learned it hard way
EDIT: Phone shutdown at 13% after this, but I think it'll do better in time..
Can't Calibrate the Widget
I am having a similar issue with my htc aria. Problem is that it gets to about 78% and then won't go any higher. It even shows (in Battery Monitor Widget)
"Discharging" and "AC plugged". I have let it sit plenty long enough to be fully charged and then completely discharged it (until it shut itself down, which was not 0%) and recharged until it reaches 78% again and stops charging. I'm guessing it is so far out of whack that it says I'm at 78% but I am really at 100%.
The widget says to charge to 100% and then drain completely to 0% to calibrate. I can't do either from what I can tell. So what to do?
theGanymedes said:
Today, I discharged battery to 0 percent, plugged the AC charger while it's OFF and charged it for around 2h22m until Led-green-full; then turned on the phone with charger plugged and plugged it off just after the boot process.
Click to expand...
Click to collapse
Quick tip - let the phone charge for another hour or so after the light goes green (when charging it while powered off). I've read that the light goes green at about 95%. It takes another hour for the phone to really charge to 100%. That's because Li-Ion batteries use two stages to charge: a fast one and a slow one. More details here.
Glad i could help.
P.S. - It also took me two complete charge/discharge cycles to fully calibrate my battery meter after switching from FroYo to Gingerbread.
@vkyjackie - Try fully charging the phone while powered off. If it still doesn't fully charge (LED green), then you might have an issue with either the battery pack or the wall charger.
Hi, sry for my english=(
When i charge my battery its normally charge to 80% and then becomes 100%.
Try calibrate battery but this doesnt help. Also try another roms and kernels.
Is it a battery issue?
U can buy new battery from DEALEXTREME.com
so its the only way?
Try this.
Charge battery to full. Leave plugged in, Turn off fastboot in power settings and shut phone off. Light will turn orange again and let it charge til green. Boot into recovery and wipe battery stats. After this let the battery drain as low as 10% before recharging to full without unplugging. Do this a few times over a few days. If you don't get more accurate percentages after this then the battery could be messed up.
Gizmoe said:
Try this.
Charge battery to full. Leave plugged in, Turn off fastboot in power settings and shut phone off. Light will turn orange again and let it charge til green. Boot into recovery and wipe battery stats. After this let the battery drain as low as 10% before recharging to full without unplugging. Do this a few times over a few days. If you don't get more accurate percentages after this then the battery could be messed up.
Click to expand...
Click to collapse
thx i will try.
i have the exact same issue. i have done battery stat wipe..flashed multiple roms over and over with full wipe and all that. battery charges up to 80% then the LED turns green..and stays that way till it reaches 100%. it jumps from 80% to 100% in just a few minutes.
battery jump
I wouldn't worry Lendlord mine does the same (see attached pic) you can see the green line jumps up from 80 to 100 but doesn't jump down from 100 to 80 under use. The picture is taken from Battery monitor widget, it's a great app which shows mv, ma, % and temp and even keeps a text log of what ma drain there has been allowing you to monitor battery drain while you're using your phone or while it is sleeping.
Here's a great guide aswell of how to ensure best battery life by memnoc:
forum.xda-developers.com/showthread.php?t=1226016
so thats mean that some battaries have the same issue=( And there is no solution for it...
HTC failed again...
first GPS and now the battery. Bad, very bad!
And one more request.
Can someone post your current widget log?
LendLord said:
so thats mean that some battaries have the same issue=( And there is no solution for it...
HTC failed again...
first GPS and now the battery. Bad, very bad!
And one more request.
Can someone post your current widget log?
Click to expand...
Click to collapse
I have the same thing happen to mine, i think its because you've let your DHD die due to low battery levels and that damages the battery which i think causes this problem
..letting the phone shut off because of a completely discharged battery is NOT good for the lifetime of Li-ION batteries.
The battery could be hurt and the amount of mAh the battery is able to store might be lower after.
Also trying to 'pump' the battery to fully charge by connecting / disconnecting while the phone is down is not a good advice because li-ion batteries also don't like overcharging.
To be sure that the battery is fully charged due to its ability it is sufficient to let the phone be conectet to charger or usb overnight.
Android uses the voltage of the battery to estimate (!) the % charge value.
Android supposes the battery is fully charged when it enters the voltage of about 4.2 Volt which is the charging cut-off voltage for li-ion cells.
Now when charging again the conceded voltage is reached more quickly than estimated by android, so the system is 'surprised' of this rapid charge and changes the % value to 100% because the conceded voltage is reached more quicklyy as supposed.
(Try to fill a 0.5ltr beer bottle into a 0.33 glass)
This is the normal of aging for li-ion batteries.
Consider for yourself if it's acceptable for you or if you should by a new battery.
by the way... be careful with cheap china batteries for 10$.
Offers with exaggerated values (up to 1600mAh) will mostly keep their promises
only for the first two or three charges only and will than fall back to 800 mAh or even less !
Greetz
Pudel
Yeah...
My battery started to do the same thing for a week or two. It will charge to 86% then it jumps to 100%, saying it's charged.
This is normal afaik, nothing to worry about.
Sent from my Desire HD using xda premium
solve
actually，it's the problem of your rom , in the framwork.apk . unzip it you will get a lot of battery icon form 1%to 100% in the res file ，if it made mistake，that 'your problem. you can go to uot kitchen to coustom it again.
Nope!
I've solved my problem. I've bought a new (original) htc battery, and the new one works great. I haven't reflashed the rom, or made any new modification. Just added the new battery.
So, yes, it's a faulty battery.
LendLord said:
Hi, sry for my english=(
When i charge my battery its normally charge to 80% and then becomes 100%.
Try calibrate battery but this doesnt help. Also try another roms and kernels.
Is it a battery issue?
Click to expand...
Click to collapse
Download Current widget from market and charge ur phone then wait for the 0 ma then download the battery calibration app from market too and calibrate and unplug ur phone, u can aslo reboot to recovery and wipe battery stats hope it helped you
Hi,
I keep getting multiple views when search the forum regarding CORRECT method for charging One for first few times and then after. Kindly suggest if you know for sure.
Many Thanks...
as allways: full --> empty --> full
most say two or three times is enough
Do it again when you install a new ROM or kernel
StephanSch said:
as allways: full --> empty --> full
most say two or three times is enough
Do it again when you install a new ROM or kernel
Click to expand...
Click to collapse
Thanks for quick reply...
don't know which thread but i remember reading about not to drain it down to zero, suggesting to charge when down to around 5%. Hence the dilemma.
Give a hint if you find it again. I haven't read it before
I'm doing as written and have a quite good (in comparison to what you are reading here) battery statistic.
Would you charge it power on or off for first few times?
veerm said:
Would you charge it power on or off for first few times?
Click to expand...
Click to collapse
I don't know wether the advantages with new ROM/kernel take effect when it is off, so powered on.
Dankeschön
veerm said:
Hi,
I keep getting multiple views when search the forum regarding CORRECT method for charging One for first few times and then after. Kindly suggest if you know for sure.
Many Thanks...
Click to expand...
Click to collapse
You have a li-poly battery, and a lithium polymer battery doesn't need any particular charge method or charge cycle... However there's two things you can consider doing for your phone's battery.
1. Charging the phone for a full 5 hour period (even if it shows 100% charged, keep it plugged in to the end of 5 hours) and then wipe battery stat in cwm recovery if your phone doesn't detect remaining battery correctly.
2. Charging it from 50% remaining battery life is much better than letting it go all the way down to empty!
(I know lots of people told you to let the battery drains completely and then fully charge your battery, but trust me, i'm an electronic engineer, I know better, both draining the battery to 0% and charging it to full 100% are bad for your battery life, those were for ni-mh batteries not li-poly)
Sent from my HTC One X using XDA
Exactly. No need to do full charges. Just plug it in whenever. If you are anal, then keep the charge cycling low. Eg keep the battery on a small band of charge state for example 50%-75%.
Sent from my HTC One X using Tapatalk 2
srashedian said:
Charging the phone for a full 5 hour period (even if it shows 100% charged, keep it plugged in to the end of 5 hours) and then wipe battery stat in cwm recovery if your phone doesn't detect remaining battery correctly
Click to expand...
Click to collapse
So, when the phone battery is down to 50%, we charge it.
And then when charged to a 100%, let it stay charged for an additional 5 hours, after that, or 5 hours TOTAL, from the time it is plugged in?
Sent from my HTC One X using XDA
C56X said:
So, when the phone battery is down to 50%, we charge it.
And then when charged to a 100%, let it stay charged for an additional 5 hours, after that, or 5 hours TOTAL, from the time it is plugged in?
Sent from my HTC One X using XDA
Click to expand...
Click to collapse
5 hours total, the point of this is to let your battery voltage go to it's maximum capacity (something around 4200mv, you can check the current voltage by dialing *#*#4636#*#* in your phone and going to battery information section)
And also note that full 5 hours charge cycle is just necessary when your phone doesn't detect your battery remaining percentage correctly... In normal situations just charging the phone from around 50% to almost 100% is an optimal charge method and you don't have to do the 5 hours charge...
Sent from my HTC One X using XDA
srashedian said:
5 hours total, the point of this is to let your battery voltage go to it's maximum capacity (something around 4200mv, you can check the current voltage by dialing *#*#4636#*#* in your phone and going to battery information section)
And also note that full 5 hours charge cycle is just necessary when your phone doesn't detect your battery remaining percentage correctly... In normal situations just charging the phone from around 50% to almost 100% is an optimal charge method and you don't have to do the 5 hours charge...
Click to expand...
Click to collapse
The point you're trying to make is that for better battery life, it is important to re-charge when the battery falls to 50%, and not wait till it drops to 5-10%. Correct?
For Li-Po batteries, how low is it okay to let it go, before a re-charge?
C56X said:
The point you're trying to make is that for better battery life, it is important to re-charge when the battery falls to 50%, and not wait till it drops to 5-10%. Correct?
For Li-Po batteries, how low is it okay to let it go, before a re-charge?
Click to expand...
Click to collapse
Exactly...
It's better to charge your phone between 35% to 75% (optimal value is 50%) and not letting it go under 35% but after all as I said there is no need for an specific charging method and this precautions just give you something like 25% more battery life (and battery life is overall life of your phone's battery before you have to replace it, not the 100%~0% duration)
Hello guys,
whats your opinion about charging Redmi note 5/Pro mobile battery from 0% to 100%, Is it really safe to do ?
As some user reported, charging from 0% to 100% may spoil lifespan of battery..
Whats your charging routine?? When do you guys start charging redmi note 5/pro ?? Share your opinion on charging routine
I usually change my phone about every 3 months so, i never worried about the health of my battery, i always charge from 0 to 100
No trouble full chargin. If u able, better to not discharge below 50%, as all lithium batteries, but influence of this behavior on battery lifespan is not measured.
Personally I feel anxious when see 30% left and charge at this time, but its only my habit
Madseb said:
I usually change my phone about every 3 months so, i never worried about the health of my battery, i always charge from 0 to 100
Click to expand...
Click to collapse
What you will do with older mobile ??? Right now im charging my mobile from 15% to 100% (I will charge from 0 to 100% very rarely)
d1g1m4n said:
No trouble full chargin. If u able, better to not discharge below 50%, as all lithium batteries, but influence of this behavior on battery lifespan is not measured.
Personally I feel anxious when see 30% left and charge at this time, but its only my habit
Click to expand...
Click to collapse
Yes.. thats good habit... I used to charge my mobile from 15% to 100%
for me , i will charge the phone anytime i needed
They say 50% to 80% is optimal for long term battery health.
But, who would do that. Charging from 0 to 100 isn't so bad if your phone lasts 2 days and if you keep the temps low.
I usually put on charge at around 30% sometimes ~40% if I'm going out and need a top up. Even when around 30% I usually average about 8hrs screen time over 24-36hrs, so batty life is good for me. Generally never run battery to empty, try to avoid ever going under 20%.
Sent from my Redmi Note 5 using Tapatalk
SunilSuni said:
What you will do with older mobile ??? Right now im charging my mobile from 15% to 100% (I will charge from 0 to 100% very rarely)
Click to expand...
Click to collapse
I usually selled or give it to someone of my family, right now im waiting a few months and i want the mi 8 explorer, but i dont know, is very expensive
I Always Charge My Phone When Battery Below 40% and Disconnect Charger When Battery Between 80% to 92%
100% Charge My Phone one time in 15 day
i charge mine between 20% or 15% upto 100%
not sure about depleting to 0. wasnt that for nicds batteries that had a memory but not lithium or lipos.. but yet again ive seen many articles about lipos not to discharge to 0.
its been a while since i knew about batteries when usw=ed to fly rc helicopters.. more then 10 years ago.
not sure whats new.. i also think fast charge affects battery life.
SunilSuni said:
Hello guys,
whats your opinion about charging Redmi note 5/Pro mobile battery from 0% to 100%, Is it really safe to do ?
As some user reported, charging from 0% to 100% may spoil lifespan of battery..
Whats your charging routine?? When do you guys start charging redmi note 5/pro ?? Share your opinion on charging routine
Click to expand...
Click to collapse
Charge ur phone till 100% then charge extra for half an hour.. I felt the difference..it added extra time to the battery
Siddharth chauhan said:
Charge ur phone till 100% then charge extra for half an hour.. I felt the difference..it added extra time to the battery
Click to expand...
Click to collapse
Will try that
Just charge however and whenever. Then replace the battery after 1-2 years
SunilSuni said:
Hello guys,
whats your opinion about charging Redmi note 5/Pro mobile battery from 0% to 100%, Is it really safe to do ?
As some user reported, charging from 0% to 100% may spoil lifespan of battery..
Whats your charging routine?? When do you guys start charging redmi note 5/pro ?? Share your opinion on charging routine
Click to expand...
Click to collapse
its safe but when u do it it resets its log... so better do 20-70
It's best to stay between 30 and 70% but that counts for every phone
It is good to be concerned for your smartphone's heat but don't be too worried about it. What matters most is to enjoy using it and not being anxious for such things. Just try to not let it discharge completely and unplug it before it is fully charged when possible. As someone else said above, you can change the battery with a fresh one in a few years. I doesn't cost much. That's my personal opinion though
Xiaomi recommends to keep atleast 10% of charge all the time to extend battery
Any phone I used, charging no more than 95%, discharging no lower than 25%. In this range, I charge when I want, no rules!