PRS-900 battery on PRS-900

kalex · 01-25-2010, 02:54 PM

quick question for those with PRS-900. I bought mine on January 15th.
Gave it full charge. I used it for about 15-20 minutes, read about 20 pages. then put it into sleep mode.
Wireless was off (I turned off the physical switch). Today I turned it on and its completely dead.
I also have prs-300 and that battery seems much better. is this because the battery is new and needs few cycles on it?
it seems to me that its draining too fast specially since my wireless is off.
I'm going to try to charge it again and try it. Did anybody else have similar issue?

thanks

Alex

DougFNJ · 01-25-2010, 02:58 PM

So far I have had mine 6 days, I have played with it quite a bit, and it is down 2 bars. I am anticipating getting 2-3 weeks out of a charge

These types of batteries always benefit by a full discharge/charge cycle.

olguy · 01-25-2010, 03:05 PM

When I received mine it had 2 bars. Even though Sony says charge upon receipt I just had to play with it. I added some books, deleted some books, played with font sizes, etc. I was about 1/2 way through a 300 page book when it went to 1 bar. That was 4 days. I then charged it so we'll see how long it lasts now. I keep the wireless off and I turn the 900 off when not in use.

Kolenka · 01-25-2010, 03:18 PM

The battery is new, and 10 days is not terrible. It should be able to hit 14 though. After about 16 for me, I got tired of waiting for the battery to die and just recharged it.

kalex · 01-25-2010, 03:38 PM

Thanks everybody. Weird thing is that it was just sitting on my desk and i haven't used it in 10 days. had to deal with other stuff at work and at home so i kind of forgot about it. so I'm not even sure when it died. I'm charging it right now again. and will test it out more carefully. Hopefully its just a brand new battery and needs a break in period.

Kolenka · 01-25-2010, 03:52 PM

The max battery life (even when asleep) is about 2-2.5 weeks. You will reach a limit even if you don't use it, unless you turn it completely off, and even then the battery will discharge over 2-3 months.

kalex · 01-25-2010, 03:59 PM

ah so there is drainage even when it sleeps. I use to have prs-500 before prs-900 and that one lasted for a while. thats good to know. Thanks Kolenka

Kolenka · 01-25-2010, 04:02 PM

It's the same with the 500/505 as well (my 505 lasts about 3 weeks at most without recharging asleep if I never use it). The 10 days is a bit low and makes me wonder if the 3G was off or just in standby, though.

kalex · 01-25-2010, 05:50 PM

it was definitely off. switch on the bottom of the prs-900 was and is in the off position.

sirmaru · 01-26-2010, 09:57 AM

Always leave the wireless switch in the off position. Also, when not in use and above 2 bars, leave in shut down mode. After it hits 2 bars leave it in sleep mode. If you leave it in shut down mode after 2 bars it may not be able to turn on without first charging.

Using the 900 and the 505 this way, my 505 lasts 49 days after 2 years since purchase. My 900 lasted 14 days after initial purchase and now has gone 20 days and still has 3 bars left.

Always recharge when down to one bar.

Penforhire · 01-26-2010, 11:06 AM

I had always read, about lithium ion batteries, it was better for long term life to "top off" frequently than to discharge deeply. Has that changed?

Kolenka · 01-26-2010, 11:12 AM

Nope.

01-25-2010, 02:54 PM	#1
kalex Zealot Posts: 132 Karma: 3248 Join Date: Jun 2007 Device: sony	battery on PRS-900 quick question for those with PRS-900. I bought mine on January 15th. Gave it full charge. I used it for about 15-20 minutes, read about 20 pages. then put it into sleep mode. Wireless was off (I turned off the physical switch). Today I turned it on and its completely dead. I also have prs-300 and that battery seems much better. is this because the battery is new and needs few cycles on it? it seems to me that its draining too fast specially since my wireless is off. I'm going to try to charge it again and try it. Did anybody else have similar issue? thanks Alex

01-26-2010, 09:57 AM	#10
sirmaru Wizard Posts: 2,426 Karma: 6561538 Join Date: Nov 2007 Device: Kindle PW 2013, HDX 2013, Galaxy S5 2014	Battery strategy Always leave the wireless switch in the off position. Also, when not in use and above 2 bars, leave in shut down mode. After it hits 2 bars leave it in sleep mode. If you leave it in shut down mode after 2 bars it may not be able to turn on without first charging. Using the 900 and the 505 this way, my 505 lasts 49 days after 2 years since purchase. My 900 lasted 14 days after initial purchase and now has gone 20 days and still has 3 bars left. Always recharge when down to one bar.

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01-25-2010, 02:58 PM	#2
DougFNJ Avid Reader Posts: 273 Karma: 1332 Join Date: Dec 2006 Location: New Jersey Device: Kindle Paperwhite Signature, 2TB iPad Pro 11”	So far I have had mine 6 days, I have played with it quite a bit, and it is down 2 bars. I am anticipating getting 2-3 weeks out of a charge These types of batteries always benefit by a full discharge/charge cycle.

01-25-2010, 03:05 PM	#3
olguy Enthusiast Posts: 38 Karma: 26 Join Date: Jan 2010 Location: Kingwood, Texas Device: Sony Daily Reader	When I received mine it had 2 bars. Even though Sony says charge upon receipt I just had to play with it. I added some books, deleted some books, played with font sizes, etc. I was about 1/2 way through a 300 page book when it went to 1 bar. That was 4 days. I then charged it so we'll see how long it lasts now. I keep the wireless off and I turn the 900 off when not in use.

01-25-2010, 03:18 PM	#4
Kolenka <Insert Wit Here> Posts: 1,017 Karma: 1275899 Join Date: Jan 2008 Location: Puget Sound Device: Kindle Oasis, Kobo Forma	The battery is new, and 10 days is not terrible. It should be able to hit 14 though. After about 16 for me, I got tired of waiting for the battery to die and just recharged it.

01-25-2010, 03:38 PM	#5
kalex Zealot Posts: 132 Karma: 3248 Join Date: Jun 2007 Device: sony	Thanks everybody. Weird thing is that it was just sitting on my desk and i haven't used it in 10 days. had to deal with other stuff at work and at home so i kind of forgot about it. so I'm not even sure when it died. I'm charging it right now again. and will test it out more carefully. Hopefully its just a brand new battery and needs a break in period.

01-25-2010, 03:52 PM	#6
Kolenka <Insert Wit Here> Posts: 1,017 Karma: 1275899 Join Date: Jan 2008 Location: Puget Sound Device: Kindle Oasis, Kobo Forma	The max battery life (even when asleep) is about 2-2.5 weeks. You will reach a limit even if you don't use it, unless you turn it completely off, and even then the battery will discharge over 2-3 months.

01-25-2010, 03:59 PM	#7
kalex Zealot Posts: 132 Karma: 3248 Join Date: Jun 2007 Device: sony	ah so there is drainage even when it sleeps. I use to have prs-500 before prs-900 and that one lasted for a while. thats good to know. Thanks Kolenka

01-25-2010, 04:02 PM	#8
Kolenka <Insert Wit Here> Posts: 1,017 Karma: 1275899 Join Date: Jan 2008 Location: Puget Sound Device: Kindle Oasis, Kobo Forma	It's the same with the 500/505 as well (my 505 lasts about 3 weeks at most without recharging asleep if I never use it). The 10 days is a bit low and makes me wonder if the 3G was off or just in standby, though.

01-25-2010, 05:50 PM	#9
kalex Zealot Posts: 132 Karma: 3248 Join Date: Jun 2007 Device: sony	it was definitely off. switch on the bottom of the prs-900 was and is in the off position.

01-26-2010, 11:06 AM	#11
Penforhire Wizard Posts: 2,230 Karma: 7145404 Join Date: Nov 2007 Location: Southern California Device: Kindle Voyage & iPhone 7+	I had always read, about lithium ion batteries, it was better for long term life to "top off" frequently than to discharge deeply. Has that changed?

01-26-2010, 11:12 AM	#12
Kolenka <Insert Wit Here> Posts: 1,017 Karma: 1275899 Join Date: Jan 2008 Location: Puget Sound Device: Kindle Oasis, Kobo Forma	Nope.

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