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Topic: mobile power recommendations....help (Read 1 time) previous topic - next topic


Im working on an arduino project that just simple has to be self contained and mobile. I can share the details in anyone cares. the issue at this point is how to power it mobily (battery)

I consider myself a novice, but have a pretty good grasp on battery power. I have changed out the UNO for a mini to help the power draw.

The issue consists of this:

#1 the main sensor of my project draws "<750mw"
#2 I have a 5v voltage regulator feeding it all.

So I need a battery solution that can feed min of 7v to power the voltage regulator.

my first idea was to power it all off a disposible 9v. Knowing the mah rating sucked I tried  anyway and it only lasted about 20 mins or so. LOL.

can anyone help recommend a decent mobile power solution?



Hi, 2 Lithium (LiPoly) cells 3.7 * 2 = 7.4 volts.

MANY sizes and mA-Hr ratings available.

Space? Weight?  How easy to recharge? (Multicell LiPoly Batteries need a balancing charger. If you can pull two cells out and put them in a charger this takes care of that. 

Where are you located?
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info


AA alkalines or NiMh rechargeables (2,000mAh) would run for around 13 hours. 5-6 cells though.

Maybe your sensor does not have to be on all the time- can you turn it on every second or two to save power?


For efficient power regulation, go on ebay and search for UBEC regulators that the RC crowd uses.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)


terryking228: I am located near Philadelphia PA USA. Could you point me towards a website with some of the batteries you speak of? I have a couple li-pos and have read not to stack them on my own because if it being danergous.
I can you point me towards a 7.2 stacked li-po?

prairiemystic: I could do this as a "last resort" I would perfer to not have a 6AA pack in the project, but I will if need be.

thanks for the REAL help guys. I appreciate it!

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