You can buy each piece individually or you can purchase them in kits with varying battery sizes and quantities. You can also buy D and C size adapters so you can use your AA batteries in devices that ...

Here’s a Kickstarter using these supercaps to replace the common AA, C, and D cell batteries. Even better, they can be recharged in seconds. For each size battery, the caps used actually have a ...

Mount the joule thief on a D-size-battery holder, and it makes a handy flashlight, one that gives your old batteries new life. This article originally appeared in the July 2015 issue of Popular ...

It's even possible to find adapter spacers that will convert AAA rechargeables into a C or D battery size. The point is, I've never seen these spacers for rechargeable batteries sold in brick-and ...

It seems like Tesla might be making a battery for your house. Would that be cool? I think so. But why would you need a house battery? I can think of a couple of uses: For an off-grid house you ...