OK..lets look at it this way. I have a new product to design. Its not really a portable device like a cell phone, more of laptop but much less power requirements. Balancing costs vs safety vs what the product manager wants or needs......should I attempt to convince them that NiMH is the best way to go? Ive taken over this from a now departed engineer so there is some history that I am not really privy to, but I did make mention that charging Li-Ion is a tricky thing to do and they all said...yes yes we've been made aware of....etc. They also want fast charging of the cells if possible. Bob Axtell wrote: Yes. Some variants of NiMH are very strong (3000maH in 'AA' size, for example). They have improved monthly since Lithium Ion was released. There have been few (if any) improvements in Li-Ion during that same period. To use NiMH instead of Li-Ion would require cellphone redesigns all over the world, and a SLIGHT increase in weight- but the safety benefits are major. alan smith wrote: > OK...so whats the BEST next choice for power density, etc....if Lithium Ion are not the best....NiMHy ? > > > --------------------------------- > Stay in the know. Pulse on the new Yahoo.com. Check it out. > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------------------------- All-new Yahoo! Mail - Fire up a more powerful email and get things done faster. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist