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When do you charge your battery? |
mathmos23
Joined: Feb 01, 2002
Posts: 251
From: Greece
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When the battery goes to red colour you have 1-2 days of battery capacity left....I just realized that.....I don't know.....RED colour on the battery makes me charge it.....
When you see red you think that you don't have enough time....From yellow it goes to red....why didn't use orange before diplaying red..... Like the orange signal bars have
([{MathmoS 23}]) |
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snysop
Joined: Feb 05, 2002
Posts: 117
From: GBG, Sweden
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I recharge mine when it starts "beeping"... But if I'm unsure if it would last I'll take the charger with me to work... just in case. I really HATE being without it!  |
mpakakos
Joined: Dec 03, 2001
Posts: 164
From: Greece
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Quote:
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On 2002-02-06 12:32, mathmos23 wrote:
When the battery goes to red colour you have 1-2 days of battery capacity left....I just realized that.....I don't know.....RED colour on the battery makes me charge it.....
When you see red you think that you don't have enough time....From yellow it goes to red....why didn't use orange before diplaying red..... Like the orange signal bars have
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Very good idea Mathmos!
I like it!
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Lusipher
Joined: Dec 11, 2001
Posts: 333
From: Norway
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cool! |
ben82
Joined: Jan 31, 2002
Posts: 107
From: London, UK
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I think there is no difference if you charge on/off.
But its best to charge your phone as less as possible. As a battery's performance degrades with the the number of chanrges, be-it quick or full charge. It's like wear and tear on the tyres of a car.
I know it uses L-ion Polymer technology - that allows for charging the phone when not battery isnt empty. But it doesnt stop the battery from reducing its performance with charges.
Dont keep charging your phone, unless you dont mibd battery degredation or buying new betteries. Expect to experience battery degredation within 3 months of charging, assuming you charge every 2 days. To be as energy efficient as possible, charge your battery only when empty, as each charge degrades your battery so you should use as much energy from it per charge!
I charge mine when the phone starts beeping. When the battery indicator is on its last red block, there is still a good few hours standby!
Hope this helps |
Cheys_007
Joined: Jan 26, 2002
Posts: 49
From: Manchester, UK
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Thought Lithium Polymer didn't have a memory effect? Hence no battery degredation due to "top-up" charges? Please, correct me if I am wrong. |
herboan
Joined: Dec 19, 2001
Posts: 117
From: Belgium
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The Li-polymer differentiates itself from other battery systems in the type of electrolyte used. The original design, dating back to the 1970s, uses a dry solid polymer electrolyte only. This electrolyte resembles a plastic-like film that does not conduct electricity but allows an exchange of ions (electrically charged atoms or groups of atoms). The polymer electrolyte replaces the traditional porous separator, which is soaked with electrolyte.
The dry polymer design offers simplifications with respect to fabrication, ruggedness, safety and thin-profile geometry. There is no danger of flammability because no liquid or gelled electrolyte is used.
With a cell thickness measuring as little as one millimeter (0.039 inches), equipment designers are left to their own imagination in terms of form, shape and size. It is possible to create designs which form part of a protective housing, are in the shape of a mat that can be rolled up, or are even embedded into a carrying case or piece of clothing. Such innovative batteries are still a few years away, especially for the commercial market.
Unfortunately, the dry Li-polymer as it is used in the T68 suffers from poor conductivity. Internal resistance is too high and cannot deliver the current bursts needed for modern communication devices and spinning up the hard drives of mobile computing equipment. Although heating the cell to 60°C (140°F) and higher increases the conductivity to acceptable levels, this requirement is unsuitable in commercial applications.
Research is continuing to develop a dry solid Li-polymer battery that performs at room temperature. A dry solid Li-polymer version is expected to be commercially available by 2005. It is expected to be very stable; would run 1000 full cycles and would have higher energy densities than today’s Li-ion battery.
In the meantime, some Li-polymers are used as standby batteries in hot climates. One manufacturer has added heating elements that keeps the battery in the conductive temperature range at all times. Such a battery performs well for the application intended because high ambient temperatures do not affect the service life of this battery in the same way it does the VRLA, for example.
To make a small Li-polymer battery conductive, some gelled electrolyte has been added. Most of the commercial Li-polymer batteries used today for mobile phones are a hybrid and contain gelled electrolyte. The correct term for this system is ‘Lithium Ion Polymer’. For promotional reasons, most battery manufacturers mark the battery simply as Li-polymer. Since the hybrid lithium polymer is the only functioning polymer battery for portable use today, the focus will be on this chemistry.
With gelled electrolyte added, what then is the difference between Li-ion and Li-ion polymer? Although the characteristics and performance of the two systems are very similar, the Li-ion polymer is unique in that it uses a solid electrolyte, replacing the porous separator. The gelled electrolyte is simply added to enhance ion conductivity.
Technical difficulties and delays in volume manufacturing have deferred the introduction of the Li-ion polymer battery. This postponement, as some critics argue, is due to ‘cashing in’ on the Li-ion battery. Manufacturers have invested heavily in research, development and equipment to mass-produce the Li-ion. Now businesses and shareholders want to see a return on their investment.
In addition, the promised superiority of the Li-ion polymer has not yet been realized. No improvements in capacity gains have been achieved — in fact, the capacity is slightly less than that of the standard Li-ion battery. For the present, there is no cost advantage in using the Li-ion polymer battery. The thin profile has, however, compelled mobile phone manufacturers to use this promising technology for their new generation handsets.
One of the advantages of the Li-ion polymer, however, is simpler packaging because the electrodes can easily be stacked. Foil packaging, similar to that used in the food industry, is being used. No defined norm in cell size has been established by the industry.
Advantages and Limitations of Li-ion Polymer Batteries
Advantages
Very low profile — batteries that resemble the profile of a credit card are feasible.
Flexible form factor — manufacturers are not bound by standard cell formats. With high volume, any reasonable size can be produced economically.
Light weight – gelled rather than liquid electrolytes enable simplified packaging, in some cases eliminating the metal shell.
Improved safety — more resistant to overcharge; less chance for electrolyte leakage.
Limitations
Lower energy density and decreased cycle count compared to Li-ion — potential for improvements exist.
Expensive to manufacture — once mass-produced, the Li-ion polymer has the potential for lower cost. Reduced control circuit offsets higher manufacturing costs.
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bri10
Joined: Feb 04, 2002
Posts: 5
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Que?!
wow..hold on Mr Einstein... go back right to the start here...whats a battery?
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herboan
Joined: Dec 19, 2001
Posts: 117
From: Belgium
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Sorry, i did not want to appear as Einstein,
(just in case someone wanted to know in depth)
To make a long story short:
Different batteries are:
Nickel Cadmium (NiCd) — mature and well understood but relatively low in energy density. The NiCd is used where long life, high discharge rate and economical price are important. Main applications are two-way radios, biomedical equipment, professional video cameras and power tools. The NiCd contains toxic metals and is not environmentally friendly. CAUTION HIGH MEMORY EFFECT
Nickel-Metal Hydride (NiMH) — has a higher energy density compared to the NiCd at the expense of reduced cycle life. NiMH contains no toxic metals. Applications include mobile phones and laptop computers.
NO MEMORY EFFECT
Lead Acid — most economical for larger power applications where weight is of little concern. The lead acid battery is the preferred choice for hospital equipment, wheelchairs, emergency lighting and UPS systems.
MEMORY EFFECT
Lithium Ion (Li-ion) — fastest growing battery system. Li-ion is used where high-energy density and light weight is of prime importance. The Li-ion is more expensive than other systems and must follow strict guidelines to assure safety. Applications include notebook computers and cellular phones.
NO MEMORY EFFECT
Lithium Ion Polymer (Li-ion polymer) — a potentially lower cost version of the Li-ion. This chemistry is similar to the Li-ion in terms of energy density. It enables very slim geometry and allows simplified packaging. Main applications are mobile phones.
NEARLY NO MEMORY EFFECT
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ben82
Joined: Jan 31, 2002
Posts: 107
From: London, UK
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Herboan, you do like COPY and PASTING!!!!! I think you should create a bibliography in these cases!!
Nite |
jucame
Joined: Nov 30, 2001
Posts: > 500
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Thanks herboan very explicit you really know `bout batterys. |
johanch
Joined: Jan 02, 2002
Posts: > 500
From: Oslo, Norway
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I charge my batteries when they are empty...  But I never leave the house without enough batterypower on my phone. |
seanc
Joined: Feb 05, 2002
Posts: 37
From: London
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I printed this link a few days ago in a forum, (looks a bit familiar to me!). You really should read the whole thing to get a better understanding...
http://www.powerpulse.net/powerpulse/archive/aa_080601a1.stm
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Chinny
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[ This Message was edited by: seanc on 2002-02-08 01:25 ] |
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Posted: 2002-02-06 12:32
