And how much burden voltage does that data logger introduce into the test setup? Maybe Dave needs to comp them a microcurrent.
Looks like they used a Dataq DI-145 logger for voltage (where is the graph?) and a Hantek 365 for current. http://www.hantek.com/Product/HT365/HT365_Manual.PDF
That Hantek doesn't really look like a precision instrument, I doubt the burden voltage is better than an average multimeter. Explains why they didn't show the voltage graph, they are probably pissing away almost half a volt. Also explains why the life is so short in the non-batteriser test.
I think you're likely close as far as the voltage drop. If someone has one, it should take all of 10 minutes to find the burden voltage range between 100 and 300 mA.
It's just so ridiculous that these guys run an ammeter in series during a power life test. Do they *NOT* know that they're dissipating energy in the current shunt of the meter?!!
================================================
Hey Bob, since you are still apparently reading these threads, here's some more free consulting engineering for you:
One must run *two* separate tests: one characterizing the current and a separate test measuring the battery voltage as a function of time. You don't get to run both at once UNLESS you compensate for the voltage and power loss...
i.e., you pony up for a battery simulator:
http://www.keysight.com/en/pd-2307914/battery-power-management-solutions?cc=US&lc=enghttp://www.keysight.com/en/pd-1842303-pn-N6705B/dc-power-analyzer-modular-600-w-4-slots?nid=-35714.937221.00&cc=US&lc=engYou'll need some power modules too:
http://www.keysight.com/en/pd-838452-pn-N6733B/dc-power-module-20v-25a-50w?nid=-35714.384326.00&cc=US&lc=engWith the current $214k that you'll receive from Indiegogo, you should have PLENTY of money to buy the right equipment for the job. Or you could hire an engineer with a mere bachelor's degree that actually knows what they're doing and run two separate tests.
What you folks have done to try and "prove your point" is to introduce two *additional*, substantial errors, simultaneously. Maybe you should just stop trying, because it's only getting worse for you.
And, Bob, in the interest of getting you a piece of equipment that *might* get you close to making something resembling a factual claim, I will send you my Microcurrent for free on the condition that you use it to un-hose this marketing campaign and make factual claims. Just PM me.