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SparkFun will be closed for Labor Day (9/7/2015). Orders will resume shipping out on Sept 8th. Have a great weekend!

Member #304853

Member Since: February 26, 2012

Country: United States

  • I recently bought two of these. One came damaged which I opted to fix as opposed to going through the hassle of returning/exchanging it. I bought these to primarily provide a good backup battery for my iPhone. I also wanted to use them to power some of my AVR projects. I came here to see if anyone had determined the minimum load needed to keep them on as my AVR project only draws 14mA and that didn’t cut it as it would shut off after a minute. So I did some testing with my electronic load and have determined that it takes ~90mA of load to keep them on. It was slightly lower on the 9 volt setting. Since 90mA is a far cry from 14mA it seemed rather inefficient to power my project with them. However, I did find that the load need not be constant and I could simply pulse a load for a second every minute and it would keep it on. So rather than drawing 90mA constant load, I only had to draw it for 1 second every minute. Yeah… Not exactly the perfect solution and I’m sure you could hack them to stay on, but if you want to do it without modifying it, it is a viable work around that I thought I’d share.

No public wish lists :(