dynamo crank radio
In 2007, assistant professor Yi Cui and colleagues at Stanford University’s Department of Materials Science and Engineering discovered that using silicon nanowires as the anode in rechargeable batteries increases the volumetric charge density of the anode by up to a factor of 10. This is significant because it offers an opportunity to use new types of active components for the batteries.
The active components in a secondary cell are the chemicals that make up the positive and negative active materials, and the electrolyte. The positive and negative are made up of different materials, with the positive exhibiting a reduction potential and the negative having an oxidation potential. The sum of these potentials is the standard cell potential or voltage.
In primary cells the positive and negative electrodes are known as the cathode and anode, respectively. In rechargeable cells the positive electrode is the cathode on discharge and the anode on charge, and vice versa for the negative electrode.
Already, several alternatives to rechargeable batteries exist or are under development. For transportation, uninterruptible power supply systems and laboratories, flywheel energy storage systems store energy in a spinning rotor for reconversion to electric power when needed; such systems may be used to provide large pulses of power that would otherwise be objectionable on a common electrical grid. For uses like portable radios and flashlights, rechargeable batteries may be replaced by clockwork mechanisms or dynamos which are cranked by the user to provide power.
A future development could be ultracapacitors for transportation, using a large capacitor to store energy instead of the rechargeable battery banks used in hybrid vehicles. One drawback to capacitors compared with batteries is that the terminal voltage drops rapidly; a capacitor that has 25% of its initial energy left in it will have one-half of its initial voltage. However, there are potential benefits in cycle efficiency, lifetime, and weight compared with the rechargeable batteries system.
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Article Source: ArticlesBase.com – Rechargeable Batteries – Looking Forward
Dynamo Led lantern with fm radio and alarm. Hand crank recharge
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XT511 GMRS EMERGENCY DYNAMO CRANK RADIO AM/FM $89.99 |
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XT511 GMRS EMERGENCY DYNAMO CRANK RADIO AM/FM $89.99 |
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MIDLAND XT511 2 Way Radio w/ Dynamo Crank Power *NEW* $74.37 |
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KAITO KA500 DYNAMO SOLAR CRANK EMERGENCY WEATHER RADIO $69.99 |
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KAITO KA500 DYNAMO SOLAR CRANK EMERGENCY WEATHER RADIO $69.99 |
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XT511 GMRS EMERGENCY DYNAMO CRANK RADIO AM/FM $65.00 |
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Midland Dynamo 22-Channel GMRS Emergency Crank Radio… $62.99 |
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MIDLAND XT511 2 Way Radio with Dynamo Crank Power NEW $59.97 |
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Kaito KA500 Emergency Crank Dynamo Solar Radio – Black $54.95 |
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Kaito KA500 Emergency Crank Dynamo Solar Radio – Red $54.95 |
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Kaito KA500 Emergency Crank Dynamo Solar Radio – Red $54.95 |
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Kaito KA500 Emergency Crank Dynamo Solar Radio – Green $54.95 |
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2 DYNAMO NiCad Rechargeable WORLD BAND RADIO Hand Crank $40.49 |
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lot of 10 DYNAMO ALARM CLOCK RADIO TORCH w/ crank $39.99 |
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2 DYNAMO RADIO FLASHLIGHT Hand Crank NEEDS NO BATTERY $34.77 |
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New Dynamo NOAA Radio with 4 LEDs Lamp, Hand Crank $30.95 |
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New FM/MW/SW World Receiver Crank Dynamo Solar Radio $30.00 |
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Solar Dynamo Crank Radio w/ Flashlight + phone Charger $29.99 |
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Solar Dynamo Crank Radio w/ Flashlight + phone Charger $29.99 |
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Dynamo Radio Flashlight No Battery Crank Light $29.99 |
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Dynamo World Band Crank AM FM V Radio Emergency $27.95 |
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EMERGENCY CRANK DYNAMO PORTABLE RADIO AND FLASHLIGHT $24.99 |
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Dynamo Flashlight Crank Emergency Radio Siren Alarm $24.95 |
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Solar Crank Dynamo Flashlight FM Radio Iphone Charger $23.99 |
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DYNAMO HAND CRANK SOLAR POWER RADIO FLASHLIGHT LAMP New $23.77 |
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Dynamo Solar Hand Crank Emergency Radio AM FM Weather $22.99 |
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Dynamo Solar Hand Crank Emergency Radio AM FM Weather $22.99 |
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DYNAMO NiCad Rechargeable WORLD BAND RADIO Hand Crank $22.49 |
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DYNAMO WORLD 12 BAND RADIO Hand Crank Kinetic Power $22.49 |
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DYNAMO Recharge WORLD BAND RADIO Hand Crank Shortwave $21.59 |
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NEW DEGEN DE13 EMERGENCY CRANK DYNAMO SOLAR POWER RADIO $19.99 |
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DYNAMO RADIO FLASHLIGHT Hand Crank NO BATTERIES NEEDED $19.77 |
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DYNAMO RADIO FLASHLIGHT SIREN BLINKING LED – Hand Crank $19.77 |
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DEGEN DE13 EMERGENCY CRANK DYNAMO SOLAR POWER RADIO $19.00 |
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~ Dynamo AM/FM Emergency Water Resistant Crank Radio!~ $16.99 |
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WIND-UP DYNAMO AM/FM SHORTWAVE CRANK RADIO TORCH $16.95 |
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AM/FM Shortwave Emergency-Hand Crank – Dynamo Radio $16.95 |
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New – AM/FM/SW Emergency Crank Dynamo Radio w/ Light $16.95 |
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Solar Crank Dynamo Flashlight FM Radio iPHONE Charger $15.99 |
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EMERGENCY DYNAMO SOLAR RADIO FLASHLIGHT And Hand Crank $15.59 |
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AM/FM Shortwave Emergency-Hand Crank – Dynamo Radio $15.00 |
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AM/FM Shortwave Emergency-Hand Crank – Dynamo Radio $15.00 |
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Solar Crank Dynamo LED Flashlight FM Radio 4 Nokia N97 $14.99 |
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Kaito KA001 AM/FM/Weather Emergency Dynamo Crank Radio $14.95 |
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Crank Dynamo Flashlight FM Radio Phone Socket Charger $13.99 |
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3 IN 1 EMERGENCY CRANK DYNAMO LANTERN AM/FM RADIO $12.55 |
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3 IN 1 EMERGENCY CRANK DYNAMO LANTERN AM/FM RADIO $12.55 |
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Hot Crank Dynamo Flashlight FM Radio USB Mobile Charger $11.99 |
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Hot Crank Dynamo Flashlight FM Radio USB Mobile Charger $11.99 |
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2 Dynamo Hand Crank AM/FM Radios W/ Flashlight & Siren $10.95 |
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Dynamo Crank Radio AM/FM Emergency Flashlight Siren New $9.99 |
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Dynamo Rechargeable Crank FM Radio with Flashlight $4.79 |
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DYNAMO AM / FM CRANK RADIO WITH LED LIGHT $4.00 |
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3 IN 1 EMERGENCY CRANK DYNAMO LANTERN AM/FM RADIO $2.55 |
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Kikkerland Dynamo Solar and Crank Emergency Radio, Green $19.99 The Dynamo Solar Radio allows you to charge its built-in 300 mah / 2.4V N-MH battery via solar energy or by hand cranking. Radio time when fully charged is 7 hours; one minute of hand cranking yields about 29 minutes of radio time, while radio time after about 5 hours of sunlight is 30 minutes. FM/AM/WB bands. A great environmentally friendly gift!… |
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Etón VOICELINK FR1000 ECO Edition Clock Radio (White) $59.94 Stay connected with the Voicelink FR-1000. This emergency crank radio combines two-way radio with GMRS technology, built-in flashlight, cell-phone charger and access to weather channels to prepare you for any emergency situation. Now with Bonus FRS walkie talkie included. Get prepared and get connected with the Voicelink FR-1000 today…. |
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Kaito KA888 – Portable radio. $27.85 A real good emergency radio, the KA888 has just arrived. It comes with all gadgets you need for emergency and sporting. It combines a sensitive compass, a thermometer, a siren, a clock and alarm, and the important combination is the flashlight you need in a dark night, even the dial needle is built in illumines material!… |
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Kaito KA404 Emergency Hand Crank Dynamo 5-LED Flashlight with AM/FM radio $10.90 The Kaito KA404 combines a sturdy 5-LED flashlight with an AM/FM radio, giving users a handy versatile camping accessory, job site companion, car gadget or in an emergency situation, such as a hurricane or an earthquake. Made of durable, high-impact plastic, the rugged device features 5 super bright LEDs, each of which is rated at 15,000 MCD, and it can last for 10 minutes if cranked for 1 minute…. |
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Kaito Emergency Crank Dynamo 5-LED Flashlight with AM/FM radio, RD-335A $14.90 The Kaito RD335A combines a sturdy 5-LED flashlight with an AM/FM radio, giving users a handy versatile camping accessory, job site companion, car gadget or in an emergency situation, such as a hurricane or an earthquake. Made of durable, high-impact plastic, the rugged device features 5 super bright LEDs, each of which is rated at 15,000 MCD, and it can last for 10 minutes if cranked for 1 minute… |
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MIDLAND XT511 2 Way Radio with Dynamo Crank Power $49.39 The XT511 Base Camp Radio combines the emergency power of a dynamo crank with GMRS 2-way radio technology. The XT511 is ideal for hiking or camping enthusiasts as an essential precautionary tool for any emergency situation…. |
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Etón FR1000 Voicelink Self-Powered Hand-Crank AM/FM/NOAA Weather Two-Way GMRS Clock Radio with Flashlight, Siren, and Cell Phone Charger (Black) $200.00 mono AM/FM/NOAA radio * 2-way communication with other FR1000 radios * 7 NOAA weather channels plus NOAA alerts * built-in cell phone charger (charging cable and adapter tips not included) * hand-cranked dynamo *… |
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Dorcy 41-4274 3 LED Dynamo Flashlight Radio with Phone Port $19.23 LED, Dynamo Crank Flashlight, AM/FM Radio, Siren & Universal DC Adaptor, No Batteries, No Bulbs, Fold Out Hand Crank Provides All Needed Power, Just Wind To Charge, 1 Minute Of Windup Equals 20 Minutes Of Light, Self Powered, 3 LED Lights, Ideal For Emergency, Home, Auto, Camping & Much More, Carded…. |
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Kaito KA404R Emergency Dynamo 5-LED Flashlight with AM/FM radio & Siren $29.95 The Kaito KA404 combines a sturdy 5-LED flashlight with an AM/FM radio, giving users a handy versatile camping accessory, job site companion, car gadget or in an emergency situation, such as a hurricane or an earthquake. Made of durable, high-impact plastic, the rugged device features 5 super bright LEDs, each of which is rated at 15,000 MCD, and it can last for 10 minutes if cranked for 1 minute…. |
