Batteriser – A Battery Life Enhancer
How it works?
Most new batteries contain 1.5V of energy when first bought. The problem is that many devices stop functioning at around the 1.3V mark. Batteriser uses micro-circuitry that lets you instantly tap into the 80% energy that is usually thrown away.
Batterisers are reusable on new and most “used” batteries and will be available in AA, AAA, C, & D variations.
Source: Batteriser