Why don't radios work with rechargeable batteries?
A: In fact, the radio is very suitable for rechargeable batteries, you are an old eye!
1?? In the past, when there was no popular rechargeable battery, it was the trend to use dry batteries? !
2?? In the popular rechargeable batteries, the factory in order to save costs, try not to use rechargeable batteries!
3?? If it is not equipped with a charger, it is necessary to take off the rechargeable battery and charge it again, the user feels very annoyed, and the factory should be specialized as now as the mobile phone with a charger, plus a voltage regulator circuit, the radio will increase a lot of money, the user only pays attention to the price of the brand, and ignores the convenience and practicality, over time, people formed a radio with less power consumption, not suitable for the concept of rechargeable batteries.
4?? In the past, the use of three dry batteries is 4.5V, when the battery consumption is reduced to 3.5V, the bass of the speaker is not round, and then the battery is flowing. If you change to four rechargeable batteries for 4.8V this voltage radio is withstand, as long as the output voltage is controlled, and the current is enough for the low-frequency power consumption of the speaker, more loud sound, when the battery voltage consumption is reduced to 4V, the bass is not rounded, must be charged.
5?? Last year, several parents of students put a few pock-sized walkman small radio let me repair, the design of the machine is very scientific,
?? Tell me, why do modern radios use rechargeable batteries? In fact, as long as it is DC power supply electrical appliances can be rechargeable batteries, it depends on the manufacturer how to design! I converted all the appliances in my home with dry batteries to use old mobile phone lithium batteries, is very good?? It depends on your hands!
Thank you for reading?? !
In 1992, I went to school to learn foreign languages with a single player and bought four Toshiba nickel-metal Hydride batteries and a domestic charger. The single player is the cheapest version without automatic reverse, no recording and no radio, every day after class to listen to a few hours, every day to use up 4 batteries, go back to the dormitory at night to charge, continue to charge the next day in class, generally in the afternoon or evening after class, and then take it to use. Because the single player is a mechanical and electrical integration, the discharge current is still relatively large, direct dry battery comparison cost, nickel-metal hydride charging full voltage 1.25V, can also smoothly drive the machine, charging every night and using a fixed rhythm during the day. About three and a half years old. The battery died. There were also compact tape drives that ran on gum batteries, but the prices were all four figures, making them unaffordable for students. Now lithium batteries, especially 18650 cells, are more and more common, especially the torch, cell capacity and voltage are better than the No. 5 battery, in addition to the large point, in terms of economy and convenience are good, as long as it is a more reliable brand to buy, there will be no risk of use. Just two days ago brush Taobao see XX radio is to use this cell, and can be loaded at the same time two pieces, a master and a standby. The radio is not suitable for rechargeable batteries, but because of its low price, product positioning rarely considers the rechargeable battery with a slightly higher price. The discharge current of the radio is not large, and the rechargeable battery is more suitable for high-current equipment, which may be used on the radio for 10 days and half a month. Finally, it is more convenient to buy an alkaline battery for the radio used by the elderly. I bought an 18650 flashlight for my parents and repeatedly asked them to pay attention to charging.
Who says you can't? I've used all those remote control planes and children's toys and the rechargeable batteries work pretty well.
Many radios these days come with lithium batteries
In fact, the radio has any battery is OK, as long as the voltage is suitable, the power quality is good, and the ripple is less, it will not affect the quality of the radio. Now the radio has a lot of functions, not only the built-in rechargeable lithium battery, but also the SD card can be inserted to play the music in the card, the digital automatic search station, the clock, the alarm clock function is basically standard.
Old radios did run on dry batteries
Many years ago, the technology of rechargeable batteries is still relatively backward, rechargeable batteries are basically nickel-metal hydride batteries, the price of rechargeable batteries is also quite expensive, remember before a 1.2V rechargeable nickel-metal hydride battery will be more than ten pieces, and my father's salary is only a few hundred dollars a month, the radio is generally 3V or 6V work, so you need to be equipped with 2 to 4 nickel-metal hydride batteries, The average person simply cannot afford to buy rechargeable nickel-metal hydride batteries, the cost is quite high. You might as well buy batteries for a few dozen bucks. In addition, many years ago, the rechargeable nickel-metal hydride battery capacity is not high, the number of charging is limited, and you need to buy a high price charger. So it is not that the radio is not suitable for rechargeable batteries, but the cost of rechargeable batteries is too high.
Even now, few people will use rechargeable batteries to listen to the radio, generally choose a radio with built-in rechargeable lithium batteries, or directly use alkaline batteries.
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As long as the voltage, current, and battery size are appropriate, any battery can be used on the radio. However, the rechargeable battery cannot be charged on the radio, because the radio has no charging protection circuit, which is easy to cause damage to the radio or battery.
It can be charged by hand, solar, connected to an external power source, and can charge mobile phones.... Don't worry about radio and cell phone power out!
In fact, it's not just radios, it's a lot of electronic devices, especially early devices. Why?
Today's electronic devices are silicon semiconductors, silicon semiconductor junction voltage is about 0.7 volts, two silicon tubes to form a push-pull circuit needs at least 1.4 volts, and to ensure that the voltage at each operating point of the circuit is stable, in fact, the voltage is higher than this, or even much higher.
This voltage is just like the zinc-manganese dry voltage (1.5 volts), so the circuit design is basically based on the zinc-manganese battery power supply design, and the rechargeable battery voltage is relatively low (1.2 volts), if the direct replacement, the appliance must work under voltage or even can not work.
However, as far as today is concerned, as long as it is not a discrete component circuit, the general problem is not large, the integrated circuit is integrated with a booster circuit, which can work at a wide voltage, and the direct replacement does not have too many problems.
No, it's not. In the past, there were no rechargeable batteries, and ordinary batteries were used, small radios used No. 5 batteries, and large radios used No. 2 batteries or No. 1 batteries. No matter the number of batteries, each battery voltage 1.5 volts.
Rechargeable battery, the rise after the 1990s, No.5 rechargeable battery, the same size as the ordinary 5 battery, the voltage is 1.2 volts, although it is lower than the ordinary 1.5 volt battery, but it can completely replace the ordinary battery.
The radio is very suitable for rechargeable batteries, my Desen PL600 radio needs 4 5 batteries at a time to power, to save money I use nickel-metal hydride batteries, a single battery nominal voltage 1.2V, full voltage 1.4V, a charge can be used for about a week.
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Alkaline battery voltage in the full charge state is 1.65 volts, the surface of the battery voltage is higher than the nickel metal hydride rechargeable battery, but the alkaline battery capacity is small, the internal resistance is large, with the extension of discharge time, the battery internal resistance also gradually increased, when the battery voltage is low to 1.3V, the discharge is terminated.
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And nickel-metal hydride battery due to large capacity, low internal resistance, in the entire discharge cycle, its built-in will not be significantly increased, as low as 1.0V can still drive the radio to work normally, discharge termination voltage can be as low as 0.9V, it can be seen that the radio use nickel-metal hydride rechargeable battery without any problems.
The biggest advantage of using nickel-metal hydride rechargeable batteries is that they are very environmentally friendly and save money, although the initial purchase price is relatively high, it can be recharged 500 times.
Battery costs:
If the use of alkaline batteries, the price of No. 5 alkaline battery is 1.83 yuan, the price of 4 sections is 7.32, and the service life is about one week, with reference to the nickel-metal hydride battery charging life 500 times, the cost of buying 500 times 4 batteries will be as high as 3660 yuan.
Such as the use of nickel-metal hydride rechargeable batteries, to Panasonic eneloop (Philaepu) nickel-metal hydride charging charger set example, the brand single battery maximum capacity 2550mAh, nominal voltage 1.2V, charging times 500 times, a one-time purchase of 4 plus charger costs less than 200 yuan.
Do not know, one than a fright, which is better or worse immediately judgment.
After reading this answer, I wonder if you can make the right choice in the choice of battery type?
This question should be viewed dialectically.
Rechargeable batteries are used in civil appliances on a large scale, which should be in the 1980s, before which dry batteries were used. The characteristic of the dry battery is a single voltage of 1.5 volts, and the dry battery from full charge to use up, the voltage is almost 1.5 volts, once it is close to use up, the voltage drops sharply, then the radio designed for the dry battery will think that the power supply voltage provided by the dry battery is constant voltage. This is very important for the early, there is no design of power supply voltage regulation of the discrete components of the circuit working state, once the battery is depleted, the voltage will be reduced, the working state of the radio can not be guaranteed, then the dry battery must be replaced.
The voltage state of the flushable battery and the dry battery is essentially different, whether it is the early nickel-cadmium battery or the later nickel-metal hydride or lithium battery, it is full of about 1.4 volts, and with the consumption of electricity, it falls all the way down to about 1.1 volts when it must be replaced and charged. It can be seen that if it is an early radio, when the rechargeable battery is fully charged, it is equivalent to the replacement of the old dry battery, if you try to use it, the working state of the radio is outside the best state considered in the design, and some redundancy is too small or even cannot work normally.
However, in the 21st century, many radios are now basically integrated circuits, and the design also fully takes into account the application of rechargeable batteries, so the radios produced now, unless the instructions specifically indicate that rechargeable batteries cannot be used, can be used according to their own preferences. Because rechargeable batteries can have less internal resistance than dry batteries, more able to provide large currents, and more able to drive high-power radios, especially the small-size subwoofer radios, it is necessary to use rechargeable batteries. For power-hungry radios, it is cheaper to use rechargeable batteries.
I see a lot of people's answers are not to the point, in fact, this has nothing to do with the voltage difference between rechargeable batteries and non-rechargeable batteries, we know that ordinary radios have no battery discharge protection circuit, ordinary batteries can discharge until they are not enough to make the radio circuit work normally, but any kind of rechargeable batteries have a lower discharge voltage, If the discharge exceeds this limit voltage, the performance of the rechargeable battery will be seriously reduced or even scrapped, so in terms of protecting the rechargeable battery, it should be said that the rechargeable battery is not suitable for ordinary radio.
The topic is vague and not universal. In fact, any radio as long as there is a suitable voltage range of DC power supply in line with the installation position space, no matter the use of rechargeable non-rechargeable batteries. Most radio voltage is 3V (there are a few 4.5V or 6V), the following is the most common 3V as an example: The original design is two AA (No.5) 1.5V batteries in series, generally the minimum can be used 2.4V can also be normal radio, this voltage range using two nickel-metal hydride rechargeable batteries is no problem (single charge and discharge range is 1.2V~1.38V), although the single use time is not as durable as high energy dry batteries, However, because nickel-metal hydride batteries can be recharged at least one or two hundred times, they are better than dry batteries in terms of cost performance and environmental protection. At the same time, I would also like to recommend two preferred rechargeable battery solutions: Use a single fifth polymer lithium-ion battery with a false battery connected at both ends in series, of which, 1, ternary lithium battery, charge and discharge voltage range of about 2.7~4.2V, average nominal 3.7V, radio for low-power appliances, this overvoltage is no problem after full charge, 2, lithium iron phosphate battery, charge and discharge range of about 2.2V~3.7V, Closer to the characteristics of dry batteries, can be preferred, and because of the large capacity of lithium batteries, long service life, more advantages, but pay attention to, must use and battery matching in line with the standard charger, and the radio must not use no power to consider charging, lithium batteries are most afraid of over discharge and over charging. I use the lithium battery scheme in the TV remote control also get very satisfactory results, may wish to try
If the rechargeable battery has a Dc\/DC conversion circuit, it is not suitable because the switching power supply has interference.
Radio, really not suitable for rechargeable batteries? .
I kept sheep when I was a kid? To get rid of loneliness, radio? It's a must.
If the radio uses rechargeable batteries, the radio will be more expensive to buy, and charging is also a problem, live in tents, candles, where there is power? Halfway out of power, in the wilderness, can only worry? Who will pay for the emotional damage?
The dry battery is different, it can be replaced at any time, it is very convenient, if the electricity is weak, it can also be taken out, with teeth. Bite a few times, or use a rock to get some electricity in, you can use again, and charge the battery?? Who would throw a stone at it? Unless you don't want it anymore. ??
The same voltage is OK!
I had no problem using my phone's 4.2-volt lithium battery to power a three-volt radio directly.
The radios of Letting and Changfeng and Peony, Desheng and Yongmei, which were used before, were full of batteries and did not run out of electricity for a long time. It feels like the quality is not very good, and the current one has reached the point of being unusable.
Between 1991, when I left home for college and bought my first radio, and 2006, when I stopped listening to radio, I bought many radios, all with rechargeable batteries. What do you mean the radio doesn't work? Maybe you have a special radio?
That's a fake question.
Dejin DE1103, factory standard with 4 nickel-metal hydride batteries, the radio also comes with a charger function, directly charge the battery inside the machine.
Secondly, with nickel-metal hydride, the voltage is only lower than that of dry batteries, and the radio can fully adapt.
Thank you for having such a discussion question, so that everyone can participate in the discussion of this issue.
Radios are especially well suited to rechargeable batteries.
Because the radio consumes less power, the use of dry batteries takes a long time, the battery replacement cycle is long, and the one-time investment in the early stage of rechargeable batteries is relatively large. The one-time investment of using dry batteries is small. Therefore, the previous radio design, is not equipped with rechargeable batteries and chargers. But it is fully capable of using rechargeable batteries.
I am an electronics enthusiast, of course, not that there is much achievement in electronics knowledge. Now let's talk about some personal opinions and feelings.
When I was in middle school, I liked to tinker with electronics, buy radio circuit boards by myself, assemble radios with batteries by myself, and I just liked to tinker with these.
In college, I majored in applied electronics technology. So I started playing CD players and radio in college. Are portable machines, to buy dry batteries, to tell the truth, not cheap, although the radio saves electricity, but also often buy. So in the night market stall next to the school bought AAA rechargeable charger, remember that it was not cheap at that time, the shape is probably like the following picture. The circuit is very simple, is an EI linear transformer, plus rectifier filter, and then is connected to the rechargeable battery for charging.
This circuit, when charging, the battery heat is severe, when the use of nickel-cadmium batteries, nickel-metal hydride batteries. Because of the severe heat, the charger was modified.
Changed to a simple constant-current charging circuit. The circuit principle is as follows:
The LM1117 in the image above is a low-differential three-terminal regulator IC with a maximum output current of 1A, a maximum differential pressure of about 1V, and a maximum input voltage of 15V. Here the regulator IC is connected into a low-voltage differential constant current source to charge a single nickel-metal hydride battery. The constant current output of the LM1117 is the charging current of the NIMH battery. The charging current of the battery is Ih = 1.25V\/R. If R is 2.4Ω, the charging current is about 520mA. The specific resistance value of R depends on the capacity of nickel-metal hydride batteries, and the choice of rechargeable batteries is better at 0.1C. I was supposed to charge it in about 12 hours.
Remember when I bought Panasonic's rechargeable battery, it seems that the price is not cheap, more than 20 pieces of a or a pair of again, remember not very clear.
I bought two pairs of batteries, which accompanied me through the time in college. At that time, the portable CD player was played in the dormitory almost every day, and the whole process was using rechargeable batteries. After graduation, it also took many years.
From an economic point of view, the radio uses rechargeable batteries and is very cost-effective. The one-time investment is relatively high, but there is no need to repeatedly buy batteries later, which can save a lot of money.
Many radios produced by manufacturers now use built-in lithium batteries, which are more convenient and will not have memory effects like nickel-cadmium batteries and nickel-metal hydride batteries.
I hardly ever use non-rechargeable batteries such as alkaline batteries, especially on radios. Thirty years ago, it began to use nickel-cadmium rechargeable batteries, later used nickel-metal hydride, and now it is mainly used 18650 lithium batteries.