If you’ve got a phone with a Micro USB power connector (say, for instance, an HTC Android model) and you occasionally find yourself running out of battery power, here’s something that I’ve found to work really well.

A 4xAA to Micro USB battery pack. I’ve stocked mine with Duracell ACCU / Stay charged NiMH batteries so they don’t self-discharge while they’re in waiting.

It’s not a fast charge, but if you can cope with having the phone connected to the charger in your bag / jacket pocket it will get your phone battery back into the green.

(Amazon associate) links:

  • Battery Extender Charger for Motorola Atrix, Palm Pre 2, HTC Desire HD, Samsung Google Nexus S (no longer available)
  • Duracell AA 2000 mAh Stay Charged Batteries - 4 Pack (now 2500mAh)