PRS-600 Help needed on fast usb charging question

tjhoult · 01-25-2010, 03:18 AM

Hi all,

Still love my prs 600, but have one concern (not really a problem).

I have now charged the device twice, both through the usb socket on my netbook. The thing is, it has charged both times significantly quicker than i believe it should.

I understand it is supposed to take about 4 hours, but mine has taken around 2 hours the first time, and less than 3 hours the second time. Although the the device wasn't out of power when i started charging, it was at least 500 turns past the low power stage. I've charged it until the red light goes off, and the reader shows 4 bars of battery life.

Is it fully charged? Why does it charge so quickly?

I know nothing about computers, but was surprised to learn that on my new netbook I can charge through the usb even when the computer itself is off. Is this new technology? If so, might that be the reason for the fast charge time? More direct power, perhaps?

Thanks for any advice.

Bremen Cole · 01-25-2010, 05:30 AM

I would assume if it is showing full charge, and you are getting a good amount of battery life, that it is fine. Is the battery lasting a good while between charges?

There is no doubt some computers are better at charging than others....... As far as charging when off, first of all be sure that is in fact happening..... And yes, some computers now can charge via USB even when off. My Toshiba does it, but I just don't trust it and have a regular AC adapter (PSP charger) for charging.

tjhoult · 01-25-2010, 08:04 AM

The battery from the first charge was so-so. But then I was getting used to it, touch-screening a LOT, switching books and making notes just to check it out, and i've not actually switched it off. However, the first charge or two are expected to be a bit less than optimal, right? I think now t's run down and charged back up, it should be fine, provided it has fully charged in the first place.

The red light was on, then went off after around 2 hours, so i think it's fully charged. It just happens much, much quicker than Sony say it should.

Does anyone else find this?

DixieGal · 01-25-2010, 08:19 AM

I think you are probably normal. Mine can go from half the battery used units to full in <2 hours.

On my 505, I can go from a full battery drain dead to red charging light in 2 hours. Then another 2 hours to fully charged. (NOTE: After an hour, pull the plug and re-plug it. The red light will not come on until you do that. It is OK for mine to just yank the USB cable and then reconnect it after your reader settles down and restarts. Dunno why, but the red light is comforting when you think it is dead, it's your reader's little red heart.)

I know, I know, it won't charge from dead on a USB on my laptop. But it does, not probs. I don't even own a wall charger. Whatever.

HarryT is the reigning battery expert, and he says the battery is not like the old timey rechargeables that needed to drain before recharging. It is OK to recharge often, so just plug it in whenever you are near your computer.

BTW, trust me, when you really get into converting and customizing and downloading and stuff, you will end up plugging it in frequently all the time just from regular tinkering.

Meanwhile, congratulations on choosing such a great device and have fun exploring all of the ebooks out there!

HarryT · 01-25-2010, 12:34 PM

What I find with my 600 is that USB charging doesn't really charge it all the way. That is, I connect to USB, and charge until the light goes out. But then, if I connect it to my PSP charger, it charges a significant amount more (and definitely lasts longer).

Charging with a PSP charger is, in my experience, a lot more reliable than with USB.

Penforhire · 01-25-2010, 01:42 PM

I recall the minimum charging standard for powered USB is 100 milliamps but I don't think the bus is required to be that anemic. Maybe your USB port has more current available.

tjhoult · 01-25-2010, 10:20 PM

Thanks for the help so far.

Kolenka · 01-25-2010, 11:38 PM

Quote:

Originally Posted by Penforhire

I recall the minimum charging standard for powered USB is 100 milliamps but I don't think the bus is required to be that anemic. Maybe your USB port has more current available.

Max over USB is 500mA under the spec. The AC adapter provides 2000mA.

01-25-2010, 03:18 AM	#1
tjhoult Junior Member Posts: 5 Karma: 10 Join Date: Jan 2010 Device: Sony prs 600	Help needed on fast usb charging question Hi all, Still love my prs 600, but have one concern (not really a problem). I have now charged the device twice, both through the usb socket on my netbook. The thing is, it has charged both times significantly quicker than i believe it should. I understand it is supposed to take about 4 hours, but mine has taken around 2 hours the first time, and less than 3 hours the second time. Although the the device wasn't out of power when i started charging, it was at least 500 turns past the low power stage. I've charged it until the red light goes off, and the reader shows 4 bars of battery life. Is it fully charged? Why does it charge so quickly? I know nothing about computers, but was surprised to learn that on my new netbook I can charge through the usb even when the computer itself is off. Is this new technology? If so, might that be the reason for the fast charge time? More direct power, perhaps? Thanks for any advice.

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01-25-2010, 05:30 AM	#2
Bremen Cole Wizard Posts: 1,115 Karma: 2718 Join Date: Dec 2009 Location: Texas Device: iPad	I would assume if it is showing full charge, and you are getting a good amount of battery life, that it is fine. Is the battery lasting a good while between charges? There is no doubt some computers are better at charging than others....... As far as charging when off, first of all be sure that is in fact happening..... And yes, some computers now can charge via USB even when off. My Toshiba does it, but I just don't trust it and have a regular AC adapter (PSP charger) for charging.

01-25-2010, 08:04 AM	#3
tjhoult Junior Member Posts: 5 Karma: 10 Join Date: Jan 2010 Device: Sony prs 600	The battery from the first charge was so-so. But then I was getting used to it, touch-screening a LOT, switching books and making notes just to check it out, and i've not actually switched it off. However, the first charge or two are expected to be a bit less than optimal, right? I think now t's run down and charged back up, it should be fine, provided it has fully charged in the first place. The red light was on, then went off after around 2 hours, so i think it's fully charged. It just happens much, much quicker than Sony say it should. Does anyone else find this?

01-25-2010, 08:19 AM	#4
DixieGal Hi There! Posts: 7,473 Karma: 2930523 Join Date: Feb 2008 Location: Ft Lauderdale Device: iPad	I think you are probably normal. Mine can go from half the battery used units to full in <2 hours. On my 505, I can go from a full battery drain dead to red charging light in 2 hours. Then another 2 hours to fully charged. (NOTE: After an hour, pull the plug and re-plug it. The red light will not come on until you do that. It is OK for mine to just yank the USB cable and then reconnect it after your reader settles down and restarts. Dunno why, but the red light is comforting when you think it is dead, it's your reader's little red heart.) I know, I know, it won't charge from dead on a USB on my laptop. But it does, not probs. I don't even own a wall charger. Whatever. HarryT is the reigning battery expert, and he says the battery is not like the old timey rechargeables that needed to drain before recharging. It is OK to recharge often, so just plug it in whenever you are near your computer. BTW, trust me, when you really get into converting and customizing and downloading and stuff, you will end up plugging it in frequently all the time just from regular tinkering. Meanwhile, congratulations on choosing such a great device and have fun exploring all of the ebooks out there!

01-25-2010, 12:34 PM	#5
HarryT eBook Enthusiast Posts: 85,544 Karma: 93383043 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	What I find with my 600 is that USB charging doesn't really charge it all the way. That is, I connect to USB, and charge until the light goes out. But then, if I connect it to my PSP charger, it charges a significant amount more (and definitely lasts longer). Charging with a PSP charger is, in my experience, a lot more reliable than with USB.

01-25-2010, 01:42 PM	#6
Penforhire Wizard Posts: 2,230 Karma: 7145404 Join Date: Nov 2007 Location: Southern California Device: Kindle Voyage & iPhone 7+	I recall the minimum charging standard for powered USB is 100 milliamps but I don't think the bus is required to be that anemic. Maybe your USB port has more current available.

01-25-2010, 10:20 PM	#7
tjhoult Junior Member Posts: 5 Karma: 10 Join Date: Jan 2010 Device: Sony prs 600	Thanks for the help so far.

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