I with that they would make a 1.5V rechargable AA - whose battery chemistry were Lithium Ion. Now that would be awesome.Â
NiMH / NiCd are pretty excellent. However, as they lose their charge capacity - the voltage drops a bit. Lithium Ion doesn't do this. This is one of the reasons why, when the charge gets a bit low with the 360 controller, a rumble might turn the controller off - too much current draw for the battery capacity and the columbs can't keep up (a guess).Â
Problem is though, if the individual cells within the Li Ion battery are not balanced during charging, there can be an explosion.Â
Also, as William says - you can fit more capacity per unit of volume in a lithium ion than a NiMH/NiCd, therefore such a Li Ion could have a very long lifespan, but would have the external appearance of a standard AA battery.Â
Lithium Ion is great, but not without it's problems. One of the main ones being the expense of that third element on the periodic table...
Bring them on I say.Â
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