The unique HEC technology offers a fully packaged volumetric energy density of greater than 1,000Wh/l, which is unprecedented for a 4V rechargeable chemistry, especially when packaged in form factors ...

Infinite Power Solutions, Inc. (IPS) announced development of a new all-solid-state rechargeable battery technology with low manufacturing costs and record energy density.

Check the end of your Ryobi 4V battery — if it has a button, then all you need to do is press it. The LED that is integrated into the battery will then either light up red, orange, or green.

Instructables user [msuzuki777] had amassed quite a collection of batteries over the years, but was finding that some of his rechargeable AA and AAA cells seemed to be at the end of their useful li… ...

Check the end of your Ryobi 4V battery — if it has a button, then all you need to do is press it. The LED that is integrated into the battery will then either light up red, orange, or green.

The light is powered by a 4V rechargeable Sealed Lead Acid battery and also includes a home AC charger and car 12V DC charger, so you never have to worry about running out of power. ORBIS 3-Watt ...