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Cellular Phone Forum / Country Specific / Australian Group / February 2005How long does a battery last fully charged
How long does a battery last on average, fully charged if you do not use the phone ? > How long does a battery last on average, fully charged if you do not use > the > phone ? Type of phone?, rating of battery?, type of battery technology? Age of battery? Length of piece of string? "thegoons" <thegoons@bigpond.com> said >> How long does a battery last on average, fully charged if you do not use >> the >> phone ? >> > Type of phone?, rating of battery?, type of battery technology? Age of > battery? Length of piece of string? The string is 3 feet long. Does that help?  SignatureKwyj. (Remove your panties to reply by email) >How long does a battery last on average, fully charged if you do not use the >phone ? Just what thegoons said. Much more info required. Frinstance, I have an old QCP860 ("Lollipop") CDMA with only the internal slimline battery. Charged and turned off, six months later it's about 3/4 charge. That battery is original so probably five years old. NiMH have a quite significant rate of self-discharge, worse that NiCd. SLA (old Moto analog bagphones) were lower self-discharge than NiCd, not quite as good as my lollipop. > How long does a battery last on average, > fully charged if you do not use the phone ? Not clear what you mean by 'do not use the phone' If the phone is left turned off, how long the charge lasts varys with the battery technology. Some self discharge surprisingly quickly and even NiCds self discharge if you leave it off for months. > How long does a battery last on average, fully charged if you do not use the > phone ? Bad question, but if you want long life, LiIon will hold a charge for many months. Years even? Most new phones use LiIon now. David said.... > How long does a battery last on average, fully charged if you do not use > the phone ? If you ever get a definitive answer, I too would like to know. My 7 month old Nokia 2280 will go flat in 3 days just sitting there. The book says up to 200 hrs standby time, but it's lucky if it reaches 72 hrs. > David said.... > [quoted text clipped - 4 lines] > month old Nokia 2280 will go flat in 3 days just sitting there. The book > says up to 200 hrs standby time, but it's lucky if it reaches 72 hrs. There are so many variables that affect this. The first one is how often does the phone poll with the network, at regular intervals the phone checks in with the network to confirm it is still logged in. This of course means transmitting and therefore uses the battery more. Also the base will tell the phone what transmit power to use, depending on signal quality. So if you are further away from the base or have a poor signal the phone will use more power and drain the battery quicker. If you are in a poor signal area often the phone will switch bases regularly looking for a better signal, so that will drain the battery quicker also. SignatureThe views I present are my own and NOT of any organisation I belong to. 73 de Simon, VK3XEM. http://www.aca.gov.au/pls/radcom/client_search.client_lookup?pCLIENT_NO=157452 VoIP http://www.TALKonIP.com.au/ > If you are in a poor signal area often the phone will switch bases > regularly looking for a better signal, so that will drain the battery > quicker also. That's of course if there's more than one base available... plenty of CDMA sites in this country that are isolated omnidirectional ;) Albinus. > If you are in a poor signal area often the phone will switch > bases regularly looking for a better signal, so that will > drain the battery quicker also. Yes and no. With GSM, "switching bases" uses extra power only if the bases have different GSM location area codes. Then the phone must transmit to update the home location register (so that the cells in the correct LAC page it for any incoming call). Otherwise, the phone constantly monitors all frequencies in the "neighbouring BCCH list". This list is an information element taken from the cell that the phone is currently camped on. And the BCCH lists broadcast by rural BTSs are typically shorter than those in metropolitan areas. John Simon said.... > There are so many variables that affect this. > > The first one is how often does the phone poll with the network, at > regular intervals the phone checks in with the network to confirm it is > still logged in. This of course means transmitting and therefore uses > the battery more. Yeah, but 48hrs or so compared to the claimed "up to 200hrs" standby time? A bloody big difference. It's a little over 20 percent of its claimed capacity. What do I have to do to get that 200 hrs - leave the phone sitting under a CDMA cell? > What do I have to do to get that 200 hrs - leave the phone sitting under > a CDMA cell? No, leave it in controlled circumstances at the phone manufacturer's design office (which usually has an inbuilding cell) - that's where many of the wildly optimistic ratings come from. Is it just me or has the gap between rated and actual standby time increased over the years? My old 5110 with the extended 1500mAh Li-Ion lasted 11 days, rated 15 IIRC. My 6230 can't seem to get much past 3 1/2 days without dying on me :( Albinus. >> What do I have to do to get that 200 hrs - leave the phone sitting under >> a CDMA cell? [quoted text clipped - 7 lines] > rated 15 IIRC. My 6230 can't seem to get much past 3 1/2 days without dying on > me :( Thats the extra crap like color screens and heaps of memory etc. Albinus said.... >> What do I have to do to get that 200 hrs - leave the phone sitting >> under a CDMA cell? > > No, leave it in controlled circumstances at the phone manufacturer's > design office (which usually has an inbuilding cell) - that's where many > of the wildly optimistic ratings come from. Just like claimed fuel consumption figures, eh? I've never owned a car that came anywhere near the claimed highway or city "cycle" figures that their manufacturers had claimed. |
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