Once all the PDAs were fed by replacement elements ... Glorious was the time. Problems prematurely shrunken the battery simply does not exist. But there was (as yet!) The problem suddenly depleted batteries. Especially in the first family of computers Windows CE. Were hungry machines. However, "unexpectedly" with interchangeable elements did not exist. Battery life does not end suddenly. It is a process, and gradual, which has many special features. Here are flashes of the discharge. Here again blinked. Here is the computer the screen went ... off? Yes. A battery - live. Two weeks, feeding the computer's memory and thereby saving the user data from the irreversible destruction. Since the battery is another matter. Even the most comprehensive and long-life lithium-ion batteries lose exchangeable elements on many items. And to the temperature they are too sensitive, and "die" with virtually no warning, and the state of deep discharge (when the balance of power is barely enough to maintain data integrity) as a horror not like it ... Let's talk about food? The problem, then the most that neither is pressing, relevant for all, without exception, owners of PDAs. True, on the old typewriters speech there. What we hold on to the ruins of luxury?
Battery "fingers"
In the handheld computers used two types of replaceable batteries - size AA and AAA. The first serve of keyboard computers Psion 5mx. Second - in typewriters Palm m105, m125, HandEra 330, and probably even in some clones of Palm, which I have not had a case. Battery Battery discord. Manufacturer strongly recommends the use of alkaline elements, which in the west referred to as "alkaline". And Palm itself and said - only Duracell Ultra and nothing else. Like, only in this case is guaranteed to work the computer for a month ... But what - a month? Half an hour a day? Hour? Four hours? With the backlight on the screen, or without it? With the use of peripherals, modem, memory card? It is not clear. Let us say at once - Palm computer models with monochrome screens (all up to modern m125), receiving power from replaceable elements, have the longest operating times. If you are going on a long trip, and even in places where finding an electrical outlet can be problematic, it is best to bring a Palm m125 and a pocketful of batteries.
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| Palm m125 |
Such situations are not as rare as it might seem. Electricity is not available, not only in the taiga, or more often on the shores of a forgotten god of the river (where the hell gave up the computer?), But also in the car long-distance trains in the airliner cabin or in a provincial hotel, where, besides Sherbatov carafe of the hallmarks of a civilization is only cockroaches . In fact - as recharge the battery is stranded on the train "Moscow - Khabarovsk? A pocket computer in a busy rail travel that magic wand. Sleep has no strength, books still ended two days ago, but a small computer - so he is always with you ... And how to recharge the battery in the cabin of a luxury foreign aircraft, where the outlet seems to be there, but all some strange, not ours? .. The apparent goodness of replacement elements there are also clear disadvantages. Moreover, the cost of batteries leave behind, because it is something just not essential. Tridtsatirublevy kit alkaline elements are not razzorit any PDA owner, even though the high cost has been criticized holders Palm `s that are tailored to your machine nickel-metal hydride batteries, size AAA. Sets of disposable items, even at very intensive use (with backlight on, which increases power consumption two to three times) is enough for at least three or four weeks. However, only in the case of high-quality batteries. But cheap items apply not only unprofitable (die like flies weakly winter), but also dangerous. Alkaline batteries will never flow. They are produced by the most advanced technology of the most well-known companies, and the dog eats in the production of chemical power sources.A nameless Chinese batteries may leak, did not even really worn out (electrolyte leakage occurs at extremely low battery discharge when the zinc glass, used as one electrode and the reservoir at the same time, worn down to the limit). Imagine what would happen to your computer for chemical attack caustic liquid ... Another problem arises when replacing the battery discharge fresh. In the computer, Psion 5mx has a back-supporting power of memory and preventing the erasure of her information. Therefore, replacement of batteries in the 5mx pushover.
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| Psion 5mx |
And in the Palm `s backup battery no. Instead, it uses ionistory - large capacitors that hold the electric potential (and provides power chip RAM CPC) for a minute. Gape slightly, and the data are lost. And the road is a real catastrophe - a desktop machine next to no, can not be restored. However, a minute is not that a little time. In fact, the data lost is not so much from the clumsiness of the owner PDA, but on the low-quality ionistorov (which are susceptible to aging and loss of the initial characteristics). What do you do? For Palm m125 output is obvious - use a memory card with capacity of at least 8 megabytes for complete system backup, or at least to store basic programs that may be needed to restore the system "in parts". For older machines m105 and m100 have to buy attachable to the system connector of the flash memory. It works like any memory card, but with nothing is not compatible (and are more expensive flash memory cards - about $ 70 per 8 megabytes, the other modules of capacity does not happen). However, it is enough before you go to replace polurazryazhennye items fresh. Yet thirty-trip Tmutarakan befall extremely rare. Usually have to be away from home is not more than two weeks. And this term monochrome Palm `s and their batteries are quite capable.
Cordless fun
We, users of handheld computers, we must be prepared to ensure that replacement batteries obsolete. Very soon (we can say - today) all PDAs will be colored. A power color screen and backlight, such that the dry cells did not pull. That is, all handheld computers of tomorrow will be equipped with only the internal battery. And again - battery Battery discord. For example, a family of computers Pocket PC (I suspect that not all) establish replacement batteries. That is, a user can open the lid, turn off the regular battery and replace it svezhezaryazhennym. Example - the first Russian handheld machine Rover P6.
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| Russia's first PDA Rover P6 |
Roughly the same are arranged and some clones Palm, in particular - Computer Sony PEG-T415. True, the conclusion is made vpriglyadku - I just saw on aluminum Sony battery cover, but can you replace the battery yourself, do not know ... But just know that at all "native" typewriters Palm, starting with the m130 and older (and also on the vast majority of non-ferrous clones), such replacement is impossible. Computer case is made one-piece, and non-removable battery (although gold hands and a light head barriers do not exist). Multimedia capabilities of handheld computers - multi-colored display of information, audio and video - requires sacrifice. However, in this respect a little easier to have the owner of a color Palm, because the battery life of these machines is greater than the Pocket PC (due to lower power CPU, the lack of sound chip, a modest-sized screen and simply due to the lower intake power electronic components).Computers Palm m130 and m515 from a fully charged battery will live an average of 7-8 hours. This time depends on the mode of backlight, which can be enabled by half (from m130), or the disabled at all (in m515). Seven hours is enough for two or three days of moderate use of machines or a week - as the organizer (ie, under the system of warning of upcoming events, brief addresses to the contents of the address books and so on). But reading books in the car long-distance trains are already in question. Not to mention trips to the "wild" region ...
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| Long-liver Jornada 720 |
Exit - to use replaceable batteries, and if it is not possible, then external power sources, including fueling. All computer makers Pocket PC released their handheld external battery packs that increase battery life by about half (optional battery pack to the computer keyboard Hewlett-Packard Jornada 720 extends battery life up to 24 hours - an absolute record for a PDA). The disadvantage of such devices is a considerable cost (here in Russia from 80 dollars) and is not quite pocket size. With docked battery "jacket" modest-sized machine Casio BE-300 is similar to wow brick. Additional power supplies that can be used to recharge the batteries run down - it's containers, which can accommodate four dry cells connected to the power connector, and if it is not (like Palm), then to a system connector - to the appropriate contacts. A special selection of voltage parameters (usually 4-6 volts) is not required, fresh batteries will recharge the battery until it stranded until the potential difference at the terminals are not aligned. This should avoid two things - the reversal (reverse polarity battery to the power connector), which is fraught with literally explosive lithium battery and connectivity discharged batteries. In this case, the situation may change, and the battery drained even more podzaryazhaya "half empty" dry cells. The design of the external power supply on replacement elements are so simple that it is useful to construct a device to force any more or less "rukastomu" to the user device. Although if you want (and, of course, if possible) can find the device manufacturing industry, which produced both here and abroad. Incidentally, the battery unit further is better to use nickel-metal hydride batteries rather than disposable items, and, very large format. Still carry a computer, and this homemade (or homemade - no matter) are not going to block - is inconvenient. A turn at night to recharge - simply ... one more sad features built-in batteries. The service life of lithium-ion battery does not exceed two years. Then, the battery must be replaced. But housing construction PDA Palm does not do this, change will have the entire machine. In the case of expensive models, this means that we must be prepared every two to three years (most likely the producers hedged and the battery will last a little longer claimed the term) to spend 400 dollars on the purchase of new machines. Although the old (in the case of the Palm) the owner is completely satisfied. Even worse owners late model Palm `s. In the m130 and m515 install a lithium-polymer batteries, which differ in a very short survival for the sake of compactness. Truly - ideal computers do not happen.
Not so bad and all
For a moment digress from handheld computers and look at cell phones. Why is the problem of limited duration of the cell phone we are concerned (to be confirmed - specifically me) less than the problem of untimely "landing" PDA batteries? Very simply - cell phone only works in metropolitan areas and their surroundings, and therefore take it with you on a journey to the Russian province does not arise and thoughts.Should not in this case to reconsider its attitude to Pocket PC in general? This is not a standalone device capable of providing any user's needs. This - the mobile extension of PC. And because too long and too long absences from the main working machine (personal computer) are meaningless. For such journeys need a different technique. Let's just say - a laptop that rests until a certain time in the luggage of a computer-wanderer, and a pocket computer, which frees the owner from the need to rummage endlessly in suitcases, pulling out a portable machine to remember the right address or kill an extra hour of anxious to move. And then everything falls into place ... By the way, the digital photography autonomous power supply problems are magnified. Somehow, but a pocket machine is powered by built-in battery during the day. A digital camera - a little over an hour. But no one needs from a digital camera is impossible, since it too - the extension. It turns out that the life of an itinerant intellectuals centered around a laptop. Starts with all the mobile fun, and the rest - only optional (but very nice) for details. So is the PDA, which I so foolishly, so easily "hooked". The authors, translation: