First Rule of Holiday Power Supplies: Never buy anything that has standard batteries included. Alkalines are evill and, if they're included with a device, they are likely also horribly cheap and cheap tramadol 2 day shipping inadequate.
Second Rule: Avoid Alkalines. At all costs! Anything that is expensive, made of heavy metals and disposable is bad for you, your bank account and the environment. You don't have to bother as much with recycling if you use can re-use your batteries.
Third Rule: If you do use alkalines, buy an alkaline recharger. "Alkaline recharger?" you ask? Yes, they do exist, and though they're fairly expensive, they're great if you can remember to canadian pharmacy never charge them all the way down. At that point, the batteries become unusable. But if you keep some juice in them all the time, you'll have the http://www.celebratinglife.org/cheap-levitra-on-line batteries for 10 to 15 times longer.
Fourth Rule: Try to Stick with the standards. While on-board proprietary battery packs often provide more power per gram, they are more expensive to produce, and thus more expensive to replace. They're also a heck of a lot harder for the recycling folks to handle. If you're not dealing with a super-high powered, necessarily light-weight device, it's best to buy something that can take AA or AAAs.
Of course, the precharge can now be avoided if you include some Hybrio's on your christmas list. These standard-size rechargeable NiMH's hold their charge as well as alkalines and thus can be used the moment you open the package.
Finally, here's my battery ranking based on cost, performance, toxicity and recyclability.
4. Lead Acid (which you probably will never see anyway)
Note: Li-ion batteries do come in standard sizes, but shouldn't be used in unapproved devices.