Hi to Mike and all,
Apologies to readers for the overly technical post.
But the device is by nature, technical.
I don't think battery life, or failure is the issue here. A draining or declining battery would create reliability issues with delivery of "doses" if it were to drain below usable voltage and current delivery at all.
From the Electrocore patent sheet:
Quote:[0031] Current passing through an electrode may be about 0.01 to 40 mA, With voltage across the electrodes of 0.01 to 30 volts. The current is passed through the electrodes in bursts of pulses. There may be 1 to 20 pulses per burst, preferably five pulses. Each pulse Within a burst has a duration of 20 to 1000 microseconds, preferably 200 microseconds. A burst followed by a silent inter-burst interval repeats at 1 to 5000 bursts per second (bps), preferably at 15-50 bps.
In the clinical trial information on the Gammacore site, "Doses" delivered were 90 second duration and the device delivers 150 of them. At allowable current delivery for such an application, taking into account the total resistivity, required voltage and current drain, I would hardly call that "Heavy duty" battery drain.
An interesting post containing an email to a site user in Oz from an Oz Gammacore rep, back in 2011:
Quote:This is a copy of the email i received from electrocore in australia.
Dear David,
Thank you for the email. I am pleased to report that we have recently received TGA approval for the gammaCore device and as such would be happy to work with you in your efforts to see if nVNS therapy works for your condition. Can you please advise if you are currently seeing a neurologist or pain management specialist. If so the first step would be for us to contact them to inform them of the devices TGA approval, and if they deem you to be an appropriate candidate, we would be delighted to provide you with a trial device.
I look forward to hearing from you.
Best regards,
Jeff Reid
Chief Executive Officer
jeff.reid@electrocoremedical.com.au
The device sells for $440 and is limited to 150 doses, and if my calculator is correct that's just under $3 per dose. which is less expensive than a lot of medications out there, and much more portable than O2. you can view the website here Multimedia File Viewing and Clickable Links are available for Registered Members only!! You need to

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The device delivers an exact number of doses - according to David here - 150 of them, which surely means that the device is counting them.
Just like printer ink cartridges, or sometimes printers themselves. I have seen a few printer designs where page counts determine "end of life" in a printer that would otherwise last years. This gave rise to end users hacking EEPROM (Electrically Erasable Programmable Read-Only Memory) chips themselves, which do the memorising, so as to bypass the programmed "end of life" time-span set up my manufacturers.
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From the Electocore parent; US20130131746 A1
See here for drawings, a PDF if you want one and device details:
(Note: The battery is not pictured, nor made reference to in terms of type, rated mAh, expected life, current delivery or voltage)
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From the Electrocore patent paper:
Quote:The first truly functional, wearable pacemaker appeared in 1957, and in 1960, the first fully implantable pacemaker was developed.
Around this time, it was also found that electrical leads could be connected to the heart through veins, which eliminated the need to open the chest cavity and attach the lead to the heart wall. In 1975 the introduction of the lithium-iodide battery prolonged the battery life of a pacemaker from a few months to more than a decade.
I know battery technology has come a long way since 1975, to say the least. I was born that year. Since adulthood I have soldered in hundreds of different and superior batteries for differing end-use-applications, in 20 years of electronics manufacturing.
I would suggest that we are looking at a fairly basic CMOS counter "circuit" and EEPROM that decides for us exactly when our device will reach "throw away" status. From what I can work out, there is no user interface (like a display, readout, or USB port) that allows user reading of the number of doses already delivered. That could leave one in a nasty spot, should one actually find the device "effective" and begin to rely on it...
Given all that, I would say the device design is a quite deliberate and calculated attempt to target a deep-niche market with a product that users will come to "need" and be willing to pay for to replace, lest their CH should return.
IMO, unethical.
As we all know too well here, many a "decision" or "choice" has been made under the duress of severe and chronic CH.
I've been involved in proof-of-concept, manufacturing trial runs and have discussed the ethics and safety of devices made in different industries whilst working with electronics manufacturers.
I sincerely believe that those behind the Electrocore device believe in it's potential to help us. How many of those developers actually have CH, or have used the device?
I would say "let the trials speak for themselves", but the success rates reported anecdotally here and on other forums do not match the reported success rates in trial literature.
It smells fishy to me... battery life in this end-use-application, I suspect, has very little to do with the device becoming unusable. I think it is programmed to end.
Cheers, Ben.