Esato Forums - Sony Ericsson / Sony : Symbian phones : P900 - Is it safe to leave the phone charging *all day* in its USB cradle?

Index Menu

> New Topic
> Reply
< Esato Forum Index > Sony Ericsson / Sony > Symbian phones > P900 - Is it safe to leave the phone charging *all day* in its USB cradle? Bookmark topic

Page < 123 >

~lozishere~ Posts: > 500

try ebay
i got one from phoneshop897 (i think) for 6 quid!!!
--
Posted: 2004-03-18 18:46:45
Edit : Quote

zentro Posts: 41

It should be safe to keep your phone in the charger all day long, i.e. no memory effects. I found this:

Lithium Polymer (Li-Poly) is the newest and most advanced technology for cellular phone batteries. Li-Poly is ultra-lightweight & does not explode, even when a nail is driven through it! Since the chemistry is enclosed in plastic pouches instead of a metal can, significant weight & form possibilities exist! Manufacturers will soon be molding this type of battery to fit the dead air spaces in some cell phone designs. Lithium Polymer shows all the same advantages of Lithium Ion without the weight or rigid form factors! Li-Poly does not suffer from memory effect, and will deliver up to 40% more battery capacity than the same size of NiMH battery.

Source: http://www.pluscellular.com/new_page_6.htm

Also, about Li-Ion batteries:

Lithium Ion (Li-Ion) is an advanced technology for cellular phone batteries. Li-Ion does not suffer from memory effect and will deliver up to 40% more battery capacity than the same size of NiMH battery. Li-Ion batteries are slightly lighter than NiMH batteries and also have a longer battery cycle lifetime when compared to NiMH batteries. Unfortunately, Li-Ion batteries are more expensive and not available for older cell phone models. PlusCellular.com carries a complete line of Lithium Ion batteries.
--
Posted: 2004-03-18 20:29:00
Edit : Quote

shiphen Posts: 95

Just one minute...!

Surely "No memory effects" is *not* the same thing as saying it does mind being over changed. In my understanding, "memory effects" are a kind of tide-mark effect that builds up if a battery keeps being only partially charged and only partially discharged - that is it "remembers" that charging treatment... and doesnt like it!

One might argue that overcharging is completely different - that it is a form of abuse quite different from the traditional "memory effect", no?

Unconvinced,

Alec
--
Posted: 2004-03-18 21:01:15
Edit : Quote

zentro Posts: 41

Well, you're right but with the built-in protection circuits Li-Poly batteries are less prone to get damaged by overcharging.

Sources:
http://www.powerpulse.net/powerpulse/archive/aa_080601a1.stm: "...more resistant to overcharge; less change for electrolyte leakage."

http://www.batteryuniversity.com/print-partone-5.htm

_________________
z e n t r o
Palm Pilot Pro > Palm V > Ericsson r380s > Palm Tungsten C > Sony Ericsson P800

[ This Message was edited by: zentro on 2004-03-18 21:15 ]
--
Posted: 2004-03-18 22:14:57
Edit : Quote

dave_uk Posts: > 500

Read this thread for some more "accurate" info

http://www.esato.com/board/viewtopic.php?topic=33423

Basically:

1. There's no memory effect on Px00 batteries

2. You can't overcharge the battery

3. You should NOT let your battery run all the way down before re-charging.

Dave

--
Posted: 2004-03-18 23:00:36
Edit : Quote

tom2517 Posts: 11

yeah, i agree with dave, should not discharge the battery completely, again, this topic has been gone over a gazillion times on the ipod forum (i own a ipod) and many articles and researches indicated that li-ion or li-poly doesn't need nor should discharge completely before recharging. that in fact, these type of bettery is better off charging frequently.
--
Posted: 2004-03-19 00:28:44
Edit : Quote

zentro Posts: 41

Exactly, it's better to keep the battery level high on a Ion-Poly battery, i.e. charge as often as you can.

This is a recurring subject at Brighthand, a forum for Palm devices...
--
Posted: 2004-03-19 00:38:44
Edit : Quote

shiphen Posts: 95

>>
Read this thread for some more "accurate" info

http://www.esato.com/board/viewtopic.php?topic=33423

Basically:

1. There's no memory effect on Px00 batteries

2. You can't overcharge the battery

3. You should NOT let your battery run all the way down before re-charging.

Dave
>>

Sorry to be a cynic but none of these guys appear to be experts form either battery manufacturers nor form Sony Ericsson.

The fact is that I had a Lithium Ion (*apparently* in effect the same thing as Lithium Polymer) in my Orange SPV phone. And I *ruined it* by regularly leaving it on charge over night. In the end it would only keep the phone going for about 24 hours - and that was provided I didnt make any calls!!

Interesting to hear that letting it run down (as far as the phone will let it run down) *may* damage the battery.

However I think we need someone from Sony Ericsson to step in to tell us once and for always that
charging the thing indefinitely on the cradle does NOT damage the battery. It *definitely* did ruin my Orange SPV's one.

Ship

P.S. Do Sony Ericsson ever bother to *read* this forum?
(Or are they too busy trying to get their software to work properly with McAfee VirusScan ... ;-[ )

--
Posted: 2004-03-19 11:21:31
Edit : Quote

tom2517 Posts: 11

well, apple has said that leaving ipod in the cradle won't hurt the battery, i don't think p900 will be any different...but then, a lot of people has complained about the battery performance of the ipod...so i guess you can't trust the manufactures either, just do what you like.
--
Posted: 2004-03-19 15:46:49
Edit : Quote

GoldFinger Posts: 210

by the way i didntthink the craddle charged the phone anyway ??

or u using a different craddle to the one that comes free with it ??
--
Posted: 2004-03-19 20:53:32
Edit : Quote

Page < 123 >

New Topic Reply