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Battery Devices

The efficacy of PEMF treatment is very much dependent on the applied output intensity (Gauss or Tesla value) combined with the speed in which the pulsed electromagnetic energy penetrates the body. The magnetic energy be able to penetrate deep into the cells and bones only if each individual pulse of the pulsed magnetic field signal has sufficient high intensity, and the pulse form is built up very fast (speed of induction).
 
Batteries
Batteries
If the electromagnetic intensity is either too low or the penetration speed is not sufficiently high , the effect of the PEMF pulsed magnetic energy transfer into the body will be close to zero. This usually happens when a battery powered device has been designed to generate pulses with a standard square wave form, which is very easy in electronic design, and only requires a basic simple pulse generator.
 
Generating square wave pulses also drains batteries faster and reduces the battery's life cycle tremendously. This also occurs because the so called duty cycle of switching the pulses "on" and "off" happen for a similar time period.
 
These simple square wave pulses are then fed into a coil and automatically change into something like a trapezoidal wave form because this is inherent to coil behavior. Every coil has an electromagnetic impedance, named after the scientist Joseph Henry who discovered electromagnetic induction. Impedance is similar to resistance for DC (direct current) electronic circuits and called impedance for AC (alternating current).
 
From square to trapezoidal wave
From square to trapezoidal wave
Because PEMF is AC, the resulting pulse form is usually something similar to what is shown in the picture to the left, changing from blue to brown inside the coil. It is clear to see that the speed of induction is almost completely lost even if the intensity is still high. Deep penetration effect into the body has now been negatively impacted because it takes too much time to build up the actual required energy.
 
Almost all battery devices are designed in a similar way and only differ from each other by pulsed frequency patterns and intensities.
 
 
 
If we want to obtain a real therapeutic effect by a battery powered PEMF device, the design must meet the above design requirements for high Gauss value, pulse form, and speed of induction for each individual pulse. In addition each individual pulse has to contain sufficient energy in order to be able to have the desired effect for inducing changes in and around cells and bones!