In response to message #6 by Dave Shaffer Message #7 Posted by Garth Wilson on, 3:06 p.m., I did this a few days ago, and the no-load (except for the very high resistance voltmeter) voltages ranged from 1.1 to 1.3 volts.īatteries in parallel, of course, is another matter! Next time you need to change the AAA's in your '48, grab a voltmeter and check out the old ones. In any case, as the batteries age, they will age somewhat differently, and their internal voltage and resistance will all be different. In that case, one battery has no idea what other voltage sources are in the system. I can't see ANY possible harm in mixing battery types as long as everything is in series. Message #6 Posted by Dave Shaffer on, 11:48 a.m., Message #5 Posted by Ed Look on, 10:21 p.m.,Īs Karl said, don't mix batteries of different chemical compositions there is a chance that potential differentials in the wrong direction might induce leakage (though theoretically, blowing up could happen, too, but highly unlikely). A well-engineered device will accept a pretty large range of voltages, above some minimum necessary for operation. A "1.5" volt cell can be anywhere from about 0 to 1.75 volts in its lifetime. "Batteries" are NOT constant voltage devices, despite what the markings on the package might say. In response to message #3 by Karl SchneiderĠ.05 volts is a tiny difference, as far as batteries go. It might be best to use the same chemistry for all 3 cells, but rechargable cells in this size are not available, to my knowledge. Three "1.5 V" alkaline or silver-oxide dc cells are recommended in the manual. I can't recall having seen a dc cell with a nominal rating of 1.55 V, but I can attest that the "1.5 V" dc cells I've bought generally deliver about 1.58-1.62 V fresh out of the package. Message #3 Posted by Karl Schneider on, 2:55 a.m., Silver-oxide batteries are also recommended in the HP12C OH&PSG (Owner´s Handbook & Problem Solving Guide) and in all other 3 x 1.5V Voyagers (HP10C, 11C, 15C and 16C). Would I harm my 1984 HP 12c by using 3 x 1.55 volt silver oxide batteries instead of the recommended 3 x 1.5 volt? Message #1 Posted by robdi on 30 Sept 2004, 7:07 p.m. Different batteries have different discharge rates.HP 12c battery 1.5volt vs. Typically, the longer the discharge time, the more energy produced. It is the current supplied by the battery, measured in amperes, multiplied by the number of hours the battery can supply that amount of current. The discharge rate of batteries is expressed in ampere-hours. Higher voltages may be obtained by connecting several cells in series so that their voltages add together. The voltage of a single cell is about 1.5 volts. The battery can be reused ad recharged many times. A secondary battery is a battery that can be recharged by regenerating the electrodes inside the cell. When the electrodes are fully consumed after much use, the battery can no longer generate electricity. When the battery is connected to a circuit, a chemical reaction takes place within the cell and current flows through the circuit. The electrodes are submersed in the electrolyte. All chemical cells contain three main parts: a positively charged electrode called the cathode a negatively charged electrode, called the anode and a chemical substance, called an electrolyte. Before that time, only static electricity an innovation with no practical value could be produced.Ĭhemical batteries convert chemical energy into electrical energy by means of a chemical reaction, which consumes the metal within the cell. The Italian scientist Alessandro Volta invented the first electric battery in about the year 1800. Batteries are used to provide energy for devices from space satellites to trucks, to radios. Batteries are a convenient portable source of energy and they differ from other energy-conversion devices in that batteries contain no moving parts. Energizer.Ī battery is a device that generates electrical energy. Principal Dry Battery Systems and Typical Characteristics. "A new 'D' Battery has an emf of 1.5 V… a current of 28 A is produced"Įnergy Density.
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