How to calibrate HTC EVO battery and possibly double your battery life

Evo-batt-calWhether the HTC EVO 4G's lithium ion battery needs to be primed/conditioned is still a matter of debate, but it seems that it does need to be calibrated at least once.

Calibrating the EVO battery was actually specifically recommended by HTC a few weeks ago, but the topic has resurfaced in my inbox within the past few days, so I don't want to let another day go by without passing it on.

The method sounds ridiculous but many people have confirmed that it has nearly doubled their battery life, so it's clearly worth a shot. Instructions below.

This is a one-time only procedure.

  1. Turn the EVO on and charge it for 8 hours.
  2. Unplug it and turn it off.
  3. Plug it back in and charge for 1 hour.
  4. Unplug it and turn it on.
  5. Wait 2 minutes and turn it off.
  6. Plug it back in and charge for 1 hour.

Here's a variation of these instructions:

  1. Turn the EVO on and charge it until the LED indicator turns green.
  2. Unplug it and turn it off.
  3. Plug it back in and charge until the LED indicator turns green.
  4. Unplug it and turn it on.
  5. Once powered on completely, turn it off again.
  6. Plug it back in and charge until the LED turns green.
  7. Unplug it, turn it on, and use it normally.

Anyone try it?

Thanks, Jon & Dave!

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Jenn K. Lee

Jenn K. Lee is the founder of Pocketables. She loves gadgets the way most women love shoes and purses. The pieces in her tech wardrobe that go with everything are currently the Samsung Galaxy Note II, Sony Tablet P, and Nexus 7, but there are still a couple of vintage UMPCs/MIDs in the back of her closet.

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