Using data derived from this chart:
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And data developed by vocr and posted here: http://www.e-cigarette-forum.com/forum/e-cigarette-mods/214316-ego-booster-detailed-review.html
And data developed by pmos69 and posted here: http://www.e-cigarette-forum.com/fo...atts-cone-5-tc-clearomizers-stock-now-23.html
And data shown here for the eGo Booster: Artisan's Workshop - Ego Booster.m4v - YouTube
And using data individually obtained, the following chart was constructed:
What the constructed chart basically indicates is that the VV (variable voltage) eGo (also called a "639") is a device that operates in three distinct voltage ranges with its high range being basically identical to the EM Riva. However, because the VVs cut-off voltage is higher than both the Riva and the Joye eGo it will have a shorter usage period than either the Riva or the Joye eGo except when the device is used exclusively in the low range. The higher cut-off, lower number of uses is not necessarily bad as what is being lost is lower power vapes. Interestingly, the eGo Booster, operated at high throughout a discharge cycle, reduces discharge life by only about 10% as compared to an eGo with no Booster.
It is perhaps interesting to note that a Riva just off the charger (hit "1") has a loaded voltage very close to that of the eGo Booster (about 3.9 vs 4.0). The voltages shown in the chart are RMS voltages - or at least that is what intended. The Riva battery is the only device shown in the chart that is not pulse width modulated (PWM) or affected by PWM. The Riva voltage should be very close to what would occur with an E-power type devices. The RMS voltage and PWM are mentioned because measurement of the voltages is typically not possible with multimeters or voltage meters commonly possessed by e-cig users. Voltages measured on DC voltage scales of common multimeters will not register RPM volts if PWM is occurring.
The Booster RMS voltage is the most difficult to get to with confidence. The Booster, so I understand, is a SMPS (switching mode-power supply) type device. As such, it has "reactance" in its circuit that makes measurement of its RMS voltage difficult for people like me, someone with limited skills in the area. What is reflected for the booster as its RMS voltage is the sum of 0.46 volts and the RMS voltage of the eGo without booster. The 0.46 comes from 0.8 (the difference in voltage shown on the oscilloscope in the youtube mentioned above) divided by the square root of 3. Possibly this calculation is wrong but nonetheless the number of "hits" derived ends up coinciding with results obtained by vocr. Comments on the "correct" method of getting to proper results of the Booster's power impact at the atty would be appreciated.
A question might be does what appears to be relatively small variation in power between the considered devices justify the added costs. The current price of the EM Riva is in the vicinity of $12. Ths Joye eGo - about $15.60. The VV eGo about $30 and the eGo Booster about $60 (with which a $15.60 battery is needed). It should be noted that a change from a standard resistance atty of 3 ohms to a low resistance one of about 2 ohms, changes power at the atty by a 50% increase over standard.
Uploaded with ImageShack.us
And data developed by vocr and posted here: http://www.e-cigarette-forum.com/forum/e-cigarette-mods/214316-ego-booster-detailed-review.html
And data developed by pmos69 and posted here: http://www.e-cigarette-forum.com/fo...atts-cone-5-tc-clearomizers-stock-now-23.html
And data shown here for the eGo Booster: Artisan's Workshop - Ego Booster.m4v - YouTube
And using data individually obtained, the following chart was constructed:
What the constructed chart basically indicates is that the VV (variable voltage) eGo (also called a "639") is a device that operates in three distinct voltage ranges with its high range being basically identical to the EM Riva. However, because the VVs cut-off voltage is higher than both the Riva and the Joye eGo it will have a shorter usage period than either the Riva or the Joye eGo except when the device is used exclusively in the low range. The higher cut-off, lower number of uses is not necessarily bad as what is being lost is lower power vapes. Interestingly, the eGo Booster, operated at high throughout a discharge cycle, reduces discharge life by only about 10% as compared to an eGo with no Booster.
It is perhaps interesting to note that a Riva just off the charger (hit "1") has a loaded voltage very close to that of the eGo Booster (about 3.9 vs 4.0). The voltages shown in the chart are RMS voltages - or at least that is what intended. The Riva battery is the only device shown in the chart that is not pulse width modulated (PWM) or affected by PWM. The Riva voltage should be very close to what would occur with an E-power type devices. The RMS voltage and PWM are mentioned because measurement of the voltages is typically not possible with multimeters or voltage meters commonly possessed by e-cig users. Voltages measured on DC voltage scales of common multimeters will not register RPM volts if PWM is occurring.
The Booster RMS voltage is the most difficult to get to with confidence. The Booster, so I understand, is a SMPS (switching mode-power supply) type device. As such, it has "reactance" in its circuit that makes measurement of its RMS voltage difficult for people like me, someone with limited skills in the area. What is reflected for the booster as its RMS voltage is the sum of 0.46 volts and the RMS voltage of the eGo without booster. The 0.46 comes from 0.8 (the difference in voltage shown on the oscilloscope in the youtube mentioned above) divided by the square root of 3. Possibly this calculation is wrong but nonetheless the number of "hits" derived ends up coinciding with results obtained by vocr. Comments on the "correct" method of getting to proper results of the Booster's power impact at the atty would be appreciated.
A question might be does what appears to be relatively small variation in power between the considered devices justify the added costs. The current price of the EM Riva is in the vicinity of $12. Ths Joye eGo - about $15.60. The VV eGo about $30 and the eGo Booster about $60 (with which a $15.60 battery is needed). It should be noted that a change from a standard resistance atty of 3 ohms to a low resistance one of about 2 ohms, changes power at the atty by a 50% increase over standard.
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