Battery calibration/conditioning

[skinzz]

hi i managed to get a 16gb nexus 7 the other day and i fully charged it soon as i took it out the box, its still on 1st charge down to about 30% im just wondering do i need to prolong battery life everyone says different things about batteries , let it run down all the time ?or shall i charge it when it gets to a certail level ?


chris

[Zell]

Recharge it again at 30 percent for the next 5-6 charges. Let it drain to 100 percent once a month.

[skinzz]

I charged it fully to100% on first charge took about 3hours, I didn't see your post let it Run down to 15% then fully charged again I got about 12 hours batt before it went down to 15%

Chris

[frank]

For the lithium polymer (not lithium ion) batteries we have in our tablets, the consensus is not to ever fully discharge them.  Most will say recharge when there is 15-20% left.  I've had the best life spans by exercising the batteries frequently (e.g. try to avoid using it while plugged in) and when dormant for awhile trying to leave in the 40-60% charged range.

I don't have a better reference for this, other than the 5 years or so I've spent flying RC planes and helicopters that also use li-po batteries.
http://www.rchelicopterfun.com/rc-lipo-batteries.html

[oliface]

Just let the device run flat every few weeks. Do this with any rechargeable device, like your phone. =)

[whysoserious_058]

i sent my first device back for the screen lift but when i had it the battery life was great and it recharged in a fairly decent amount of time.  the replacement is charging so slow, in fact when i turned it off it was at 25% and i plugged it up, when i turned it back on it was at 23%.  Plugged it back in and turned off wifi and locked screen and now its recharging but ever so slowly.  Any ideas?

[Drew]

Some people are saying their N7 is fuzzy when it comes to charging.  Either that or you are extremely unlucky with tablets. 

Try turning your N7 off (after you plug it in).  You might also try a hard reset.  If those don't work, maybe your third N7 will be a charm (return it).  Either the battery or the charger is defective, assuming you are using the charger it came with and are plugging it in to a wall outlet, not a computer USB.

Good luck!

[JayJ]

Have to agree with Frank here, I've been into RC cars for a few years now and learnt that Lithium Polymer batteries (Li-Po) should not be over charged but more importantly shouldn't be over discharged. Where that leaves us with the N7's Lithium Ion (Li-Ion), well Li-Ions wear out quickly with regular full discharges so if you want your N7's battery to last longer then I suggest you don't discharge it fully.

Have a read of this: batteryuniversity.com/learn/article/charging_lithium_ion_batteries/

[whysoserious_058]

I went ahead and unsealed the package I was going to send back and swapped out the charger and usb, BINGO!!  Sending the defective charger or USB back with the defective unit... Thanks for all the outstanding posts guys/gals.  Put the old charger on the new unit and went from 46% to 97% in a matter of an hour or so, glad I encountered the problem before it was too late.

[frank]

One thing to note is that the battery seems relatively easy to replace, so maybe all this discussion isn't QUITE as critical as for other devices.

http://www.gottabemobile.com/2012/07/03/nexus-7-torn-down-battery-found-to-be-easily-replaced/
http://www.powerbookmedic.com/Google-Nexus-7-Battery-p-22598.html#

[brunapereira]

I think it is the problem of that special battery. Always keep in mind while you use new phone let blank full battery after that charge it fully then again let him blank and charge it always helpful for good battery life.
mobi ritz

[LeoRex]

It's easy... I popped the back off a DOA unit I got a while back and it is sitting right on top with a single connector.  Should swap in minutes

Sent from my SCH-I200

[pgarne01]

Related (I hope) question.  What about the "lipstick" battery packs?  Actually been thinking more about one to keep in my car for my phone emergencies.  Are they "seen" as a (USB/AC) charger by the device or somehow "bypass" battery presence detection.

Also, I listen to a lot of music and watch a lot of movies at my desk and  I'm curious to know a little more about not using my tablet while charging.    Makes sense for an RC heli but why not a Nexus?

Thanks 1*10^6

Pete