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For the one-hundred sixteenth edition of the GeoGearHeads we revisit the subject of batteries (see and for the first two). and started with some information about , , , , , and AA and AAA batteries. Then they looked at a question from about NiMH performance in cold weather. There were a couple of resources from and a by Boguslaw Pierozynski with some helpful information. also asked about the life and charging of NiHM batteries. They then tackled the rechargeable batteries for mobile devices – , , and . Some helpful tips were shared from and more information is available from . They wrapped the show up talking a little about fuel cells and the . Congratulations to for submitting the winning answer for this week's question. Thanks to for their donation of this week's gift! The live video session from this Google+ Hangout On Air can be found on . Subscribe to the feed: Social Media: Email: