BATTERY TESTER
First Claim
1. A battery tester for determining a remaining level of charge in a battery within an electronic device having an audio output jack, the tester comprising a charge measuring circuit and a stereo-type audio plug having a tip contact and two cylindrical contacts, the tip contact and the two cylindrical contacts being axially spaced and insulated from one another, wherein the charge measuring circuit has two input connections, each input connection being connected to one of said three axially spaced cylindrical contacts.
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Accused Products
Abstract
A battery tester determines a remaining level of charge of a battery mounted within a separate electronic device having an audio jack. The battery tester includes a plug and a circuit having a high impedance input amplifier. At least one electrical contact of the plug is electrically coupled to an input of the high impedance input amplifier. The plug is removably insertable within the audio jack such that the battery of the separate electronic device is electrically connected to the input of the high impedance input amplifier. When electrically coupled to the battery, an output of the high impedance input amplifier provides a signal proportional to the remaining level of charge of the battery, whereby the remaining level of charge of the battery is obtainable by the battery tester without having to remove the battery from the electronic device.
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Citations
12 Claims
- 1. A battery tester for determining a remaining level of charge in a battery within an electronic device having an audio output jack, the tester comprising a charge measuring circuit and a stereo-type audio plug having a tip contact and two cylindrical contacts, the tip contact and the two cylindrical contacts being axially spaced and insulated from one another, wherein the charge measuring circuit has two input connections, each input connection being connected to one of said three axially spaced cylindrical contacts.
- 3. A battery tester for determining a remaining level of charge of a battery mounted within a separate electronic device having an audio jack, comprising a circuit including a high impedance input amplifier and a plug having a contact that is electrically coupled to an input of said high impedance input amplifier, said plug being removably insertable within the audio jack such that said contact of said plug electrically connects the battery to said input of said high impedance input amplifier, said high impedance input amplifier having an output that produces a signal proportional to the remaining level of charge of the battery, whereby the remaining level of charge of the battery is obtainable by said battery tester without having to remove the battery from the electronic device.
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10. A method of determining the remaining level of charge of at least one battery contained within a battery compartment of an electric musical instrument, comprising the steps of:
- inserting a plug of a battery tester into an audio jack of the instrument to electrically couple the at least one battery to the battery tester without removing the batteries from within the instrument; and
observing an indication of the remaining level of charge produced by the battery tester in response to said inserting step. - View Dependent Claims (11, 12)
- inserting a plug of a battery tester into an audio jack of the instrument to electrically couple the at least one battery to the battery tester without removing the batteries from within the instrument; and
Specification