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I've been using one of the for over three months now:


http://www.ev-power.eu/LiFeYPO4-batteries-12V-1-1/Lithium-Battery-LiFePO4-12V-20Ah.html


No balancing, no protection, no nothing. I just have it in the trunk, because I put an ethanol heater in place of the original toxic battery.


So far everything is going very nicely. The battery is at 13.3 V after rest, which is a normal fully charged voltage. While driving the car charges the battery at 14.6 V most of the time, which is 3.65 V per cell, but it drops the current as much as possible while keeping that voltage, so it's hardly charging the battery, if at all. No deformation or anything. These 12 V packs come pretty much balanced out of the factory and since nothing can really ruin that balance, they just work.


https://www.dropbox.com/s/5kbj4sh26que1l4/2014-10-13%2014.21.43.jpg?dl=0


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