Batteroo offers a micro thin battery sleeve that extends the life of disposable batteries in electronic devices. 
Batteroo Inc wants to reduce the amount of “percieved dead” batteries that fill up landfills globally. Get more and waste less with Batteroo.

Batteroo Boost is the world's first battery extender micro-thin sleeve made by Batteroo Inc. that fits over your batteries and instantaneously 
extends battery life by up to 8x. Batteroo Boost comes for AA, AAA, C and D batteries that will help improve and extend the life your batteries instantly.