Probably. Charge 8 hours. Unplug, turn off, plug in again and charge 1 hour. Unplug, turn on, wait 2 minutes, turn off, plug in again and charge 1 more hour. Then turn on and use as usual. The day before I did this, it was sucking power. I made a few tweaks (turning off constant updates to FB, etc.) and then, after charging overnight did this trick. The last two days after doing it, my phone has easily gone 14 hours before I got to 30% power - and that's with moderate use.