06-19-2011 07:08 PM
06-27-2011 03:25 AM
06-27-2011 03:30 AM
07-05-2011 03:01 PM
when i plug in my playbook when it is off, i see a blinking green light that tells me it is charging. is it still true that you cant charge a PB when it is off cos thats not my experience
07-05-2011 03:04 PM
PlayBook can be charged when off with latest software release 1.0.6
07-24-2011 05:50 PM
for Peter :
the Battery University website states that it is not recommended to have a full voltage charge when reaching 100% of charge. It simply means that the battery is supposed to tell the charger to lower the voltage until reaching the "top charge" voltage (much lower voltage that is used to keep the battery fully charged, when already charged).
On the other hand, and though it seems contradictory but it is not, it is recommended that a lithium battery is always charged, that is the reason why the docks/cradles that appeared first with the Apple iPod and the first HTC smartphones are not harmful in any way to the battery.
And same goes for the datasync docks/cradles.
Now the question that was often raised by JerryG is that the nominal voltage for a battery to be charged depends on the battery itself. Usually, the battery contains an inner controller that can stop the charge in case the voltage is too high or too low (granted a too low voltage should not be harmful for the battery). For your information, this inner controller is usually what is missing in fake batteries (the ones that made the iPhones explode).
From what has happened in the recent OS releases (1.0.5 or 1.0.6 I can't remember), it seems that for the PlayBook, the battery inner controller is software and not hardware, since:
I am quite surprised by that (going the opposite way as everyone else : from hardware to software controller), maybe RIM is several steps ahead.
07-24-2011 06:22 PM
07-24-2011 06:53 PM
It's going to take me a while to parse your meaning with that, since the term "100% of charge" is meaningless other than when interpreted as "at full voltage". There is no "%" in a battery...
Battery is an energy container, my "100%" means "battery is fully charged".
Also note that it's a near certainty the batteries do have integrated/embedded microcontrollers (what you're calling the "inner controller") but I think those are unlikely to be directly involved in the charging process, at least other than as having a "veto" on whether the battery can continue to supply power (at very low voltages) and, possibly, whether it can continue to accept a charge at high voltages.
well a battery charger does modify its voltage to match the quantity of voltage the battery wants to receive, given its state of charge. So one way of the other, the battery does say "I'm half charged" or "I'm nearly full, don't push too hard on me".
Here is the time diagram that is available on battery university:
07-24-2011 07:17 PM