<div dir="ltr">Quick heads up: I finally ended up using a LM 317T to lower the output voltage to ~4V, using R1=220, R2=550 and a 1uF capacitor, plus a OTB battery pcb. The phone doesn't get as hot as before, and the "battery" powers without delay.<div>
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<a href="https://drive.google.com/file/d/0ByHQWL5Q6bSwM1FPeS1iVlBYX3M/edit?usp=sharing">https://drive.google.com/file/d/0ByHQWL5Q6bSwM1FPeS1iVlBYX3M/edit?usp=sharing</a><br><br></div></div>