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RE: How to find Trickle Charger for LiFePO4 batteries (3.3V versions)?

You can get get the same charger below. I know Abe is trying to be helpful :( but IMO what you really want to do is just be sure your battery is charged then use a 3.3V linear supply to just keep the battery charged as was mentioned if you want to follow what was originally suggested. I actually had a DAC a friend built using an Acko board that is powered EXACTLY the way JK mentioned and it works EXACTLY as described.

Maybe just use a small adjustable regulated supply from Ebay.

http://www.ebay.com/itm/LT1083CP-Linear-adjustable-voltage-regulated-DC-power-supply-kit-DIY-/201352936200?hash=item2ee191fb08:g:qcMAAOSweW5VWxK0

This one is overkill up to 7A. Maybe get one that can provide at least 2A.


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  Kimber Kable  

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