Power Down

Sure, this may seem like a very basic post, and everyone thinks they know to just pull the battery door off then yank the battery out, but is that really the best way to go about it? Simply put, no. You never want to just pull the battery out of any electronic device that is running, unless of course it is a BlackBerry, then you may be required to do so daily. (Zing!) What is the proper way to do this you may be wondering, so let's take a look real quick.

  1. Press and hold the power button of your device until the menu pops up
  2. Select Shut Down, then confirm you wish to shut the device down
  3. Wait for device to fully shut down
  4. Remove battery door, then battery
  5. Replace battery and door, then press and hold power button until screen lights up

Sure, it may seem like the simplest thing to do, replacing a battery should not be rocket science, but be sure that before yanking it out of the device that you simply power the device down properly. So, now that you know how to replace the battery, it is probably a good time to ensure that you have a back up battery for your device, you know just in case you need it.

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There are 22 comments

dchawk81 says:

As long as I have journaling enabled, I have yet to experience ill-effect from simply yanking the battery.

Can you elaborate your blog entry and explain exactly what harm can come from not shutting down first? Without doing so, this entry is simply FUD.

El Jefe says:

Question: Do you just pull the plug out of the wall on your desktop computer when you are done with it for the day instead of shutting it down?

JayPhill89 says:

Pulling the plug on a PC is much worse. The heads in the hard drive come crashing down onto the platters :-O

rocket321 says:

If my desktop used non-volatile flash storage and didn't cache file system I/O to memory then....no I wouldn't because the power cord is way at the back under the desk and hard to reach.

covac8 says:

I have 3 batteries for my htc and when the battery dies on it's own i replace it...rather than shutting down when it gets down to the last bar, for instance. What do you think of that strategy? Is it okay to let an Android device's battery run out of juice or is it better to shut down manually?

El Jefe says:

I may be wrong because I have only had a few instances when my phone died from battery running out of juice, but I think that it left itself just enough power to shut itself down before there was nothing left.

The real sad thing about your story, however, is that you need 3 batteries to get normal usage from a HTC. (Zing!)

PhiPsi32 says:

I have three (3) batteries for my HTC Droid Incredible 2. No joke. But I had four (4) batteries for my Motorola Droid 2 Global. Seriously, I keep one more than I need to get through the day.

But it's much better than my associates using the iPhone . . . every time I turn around I see an iPhone plugged into an electrical socket. And here I thought it was a "wireless" device . . .

skbgiants says:

I pull my battery several times a day and never shut down my EVO. Sprint is pretty much forcing me to do this because they won't replace my EVO under warranty for the broken usb port. Which incidentally, is a KNOW issue with Sprint and HTC. WTF Sprint. I'm not done with you yet. I'll keep climbing the ladder until I get Dan Hesse himself on the phone.

3dkit says:

2 comments: 1) I have been removing my batts without shutting down the phone for several years with NO problems. A TM rep first suggested it for my G1. Doing the same with my EVO 3D. 2) noticed recently that the usb connection on my EVO 3D is loose, or a little wobbly causing my charge light to go on & off. This is DEFINITELY a defect in workmanship. Interesting to see the problem is not uncommon. I will return the phone if this causes any more problems or when the inclination strikes. Temporarily cured by switching to a different usb cable that holds tighter although still some play at connection

cea1203 says:

this is a load of crap! I have been just pulling the battery for years on several different phones including my current HTC Thunderbolt, never had 1 single issue and never will .

kingtz says:

I do think that the Android 101 articles are generally great for beginners. However, it must really be a very slow news days at Android Central to dedicate front page real estate to teach us how to take the battery out...

K_Daddy says:

Always give your apps a chance to save there data before yanking the power. Also if the phone goes into power save mode sometimes it stays that way after I put the new battery in.
I always have xtra batteries. Why stiffle my self trying to save the battery. They're not baby seals what am I saving them for? If I can't use the phone the way I want then why have it.

circustravis says:

This is all well and good until your phone locks up so bad that it won't power down even by hitting the power button.

jj14x says:

So how about phones like the HTC EVO 3D where they have the fast boot option?
When I select "shut down", it doesn't fully shutdown - almost seems like it goes into a 'hibernate' like condition. If I yank the battery after selecting this shut down option, is it harming the phone?

AZDROIDX says:

This explains why I have had my Tbolt go crazy when I first got my spare battery, never had issue with DX but has with Tbolt. Pulling battery without proper shutdown has messed with my settings on Launcher Pro, and sometimes the screens are all all of wack that I have to load my last backup. That's why I run TI more often now. I haven't seen it happen that often anymore and I still don't do proper shutdown. But I will agree that sometimes it may cost you.

the only way this would be informative is if it applied to the Xoom!

dbareis says:

I think another step needs to go between 3 & 4 and that is to remove any USB cable or charger.

I think the lack of this step is what killed the temperature sensor in my HTC Desire HD's battery.

3dkit says:

Can also do damage to your memory card, according to my old G1 manual. Always disconnect from charger FIRST!

sdguy67 says:

People can say what ever they want, and I work with Android at Qualcomm, but my phone is terrible with app management and I have to pull my battery just as much with my OG droid as I did with my BB, or it simply stops responding as apps are constantly freezing my phone, and it isn't any specific app. Just my phone ringing will freeze my phone, and I have also had 3-4 Droids already, so it isn't just bad hardware.

err404 says:

Yanking the battery has minimal risk. The only real issue would be losing changes from in-flight writes. Theoretically an app could have problems if multiple files needed to be in sync and one set was lost during the power interruption. In general, I wouldn't worry about it.

Snakeforhire says:

GUYS !! (and especially you err404) pay utmost attention !!
DO NOT, EVER, EVER, UNDER ANY CIRCUMSTANCE, pull the battery out while the phone isn't powered down completely, ESPECIALLY THOSE OF YOU RUNNING HTC S'OFFed PHONES !

Flash RAM (be it NAND or NOR) doesn't take kindly to sudden power-offs (nevermind if you got an EXT3 or 4 FS, if you fry the chip your FS isn't gonna do jack to help you anyway). There are countless reports of phones (especially HTCs) having been "bricked" because of this very manoeuver (more precisely, pulling the battery out and pushing it back in in the next 2-3 seconds or so, without allowing the flash-ram to properly discharge) and having to be sent back to the service centre for a NAND chip replacement.. You can't do anything, no factory reset, no formatting the partitions (or only getting errors), no flashing another ROM/radio/hboot, etc.. In other words : checkmate, you're well and truly f£%ked, and if you rooted your phone you can't even downgrade it to a stock ROM to get a free replacement because the flash won't even take the update correctly...
It happened to me and my HTC Desire S about a month ago, I know what I'm talking about, believe me.. :(

And replacing a NAND if you're S-OFF'ed (which voids manufacturer's warranty) easily costs 100€ -and can go up to 200€- practically the price of a brand new phone with a contract...

For those of you who don't believe it, browse the XDA-developers forums (search for terms like "brick eMMC battery" in the forum search app), there are quite a few reports of this very problem. It's a known issue on HTC phones that's due to shitty samsung NAND chips, so beware ! best to lose 30secs to wait for a proper shutdown than to spend 2 weeks without phone like me.. :S

(for those of you who care : I bought a Galaxy S2 to replace the DS in the meantime.. The first S2 died under a week because of a factory problem which made it overheat when on AC power, it fried one evening while I was charging it on USB, got to 70-75°C and croaked. Got it replaced by Orange for free (48hrs exchange policy), and in the meantime I found a process to magically bring back my DS to life in spite of the damaged chip. It's back to S-ON now running a stock ROM and undergoing a "burn-test" see if I find any noticeable sign of weakness, so far it shows no sign of failure.. I'll S-OFF and root it again to investigate if it's truly stable, and if not it's S-ON again and back to Orange for a free replacement under warranty. xD But I probably got very lucky, and won't be pushing my luck much farther beyond that. 250€ is overpriced for a paperclip, to my tastes..)

rabaker07 says:

Agreed. I have 3 times now corrupted my phone memory by removing battery while shutting down and booting up. I think there is some writing that occurs at these times and pulling battery causes corruption. This leads to the mass force closes and missing widgets etc that only a factory wipe will cure, i.e. lose everything and start your phone from scratch. Also, booting phone while plugged in has always sent my incredible into the infinite reboot loop, and removing battery during this reboot cycle is dangerous for the reasons I mentioned previously...