Okay ppl... Some news for ya...
There's only 6 or so 'types' of batteries out there in the US market.. Alkaline, NiCad, NiMH, Lithium, Lithium Ion and Litium Polymer.
The last two are most common in Cell Phones.. NiMH and Lithium are common for digital camera's and such.. NiCad = Old & Outdated.. Alkaline, basic over the counter stuff that fills landfills in droves each day..
Now, the whole thing with Regular, Ultra, e2, Heavy Duty isn't just marketing.. There's a science behind it. Batteries are made to drain at different rates for a given load. Run of the mill stuff is fine for remotes and such.. Ultra and e2 are basically the same, just marketed diff between Duracell and Energizer and are meant for higher drain devices such as cd players, handheld games, etc.. Heavy Duty isn't what you think it is.. They're meant to be low drain, long yeild batteries fit for Smoke detectors and things of the like.. Stuff that doesn't actively do anything but just kinda sits around and works like a bull.. Some ppl would also use Heavy Duty batteries for boom boxes, but unless it's a Radio only device, I wouldn't do it.
If you really want to test the therory, take your car stereo and make sure to have a suitable jumpstart car nearby. Turn key to ACC position and let the CD Player run in repeat all mode and watch the battery drain. Time it if you like.. When it's dead, Jumpstart car and go for a drive to recharge the battery. Make sure it shows 12v while the car is Off. Make sure to hit the headlights on and off to drain the excess top voltage off the battery before testing for voltage. Then, rerun the test with just your Radio going.. Your Radio will outlast the CD Player at least 2 to 1.. This is High Drain vs. Low Drain..
Now, to throw another type into the mix, a battery created by Matsu****a in Japan called a Oxy something or other (laptop is off atm, so can't chk). It's labeled to give you at least twice the runtime of current batteries at a cost increase of 20cents..
class dismissed..
