Author Topic: IOS Boost 1/2*AA, CR123A Circuit board review  (Read 5050 times)

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Offline MRsDNF

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IOS Boost 1/2*AA, CR123A Circuit board review
« on: August 07, 2013, 10:20:27 PM »

I have used this driver ( in a kit flashlight that I have reviewed here.

Match asked a question that I was dreading. Quote ''Also, on that you have a way of measuring actual emitter current along with tailcap current? I'm curious to see if it delivers the 600ma/1cell and 1000ma/2cell outputs it claims."

With the help of my son, sixty five thumbs and trusty DMM we arrived at the following list of numbers that may or may not make any sense. With different batteries the current reading will more than likely be different. Memory works without a hitch and the modes are well spaced. To sum up I'm happy with my first AA driver.



Tail cap amps

Led amps

LED voltage

Single Turnigy AA 2200 mAh LSD battery. Starting voltage 1.4v.













Two Turnigy AA 2200 mAh LSD batteries in series. Starting voltage 2.8v.














Just a quick update for this driver with Lifepo4 batteries. I have not taken any measurements with this battery at the LED. Just a couple of pictures comparing high with a AA NiMH Turnigy and a 14500 Lifepo4.

Firstly the NiMH measuring at the time 2.45 amps at the tailcap.


And secondly the Lifepo4 battery at .9 amps at the tailcap.

Mouse over anyone please. Thanks.

When the big picture is to big, look for a point you can start at and build from there.

Offline Hellomane

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Re: IOS Boost 1/2*AA, CR123A Circuit board review
« Reply #1 on: July 16, 2018, 08:39:48 AM »
I have long been hoping to read it.