The apple batteries are rebadged Eneloops. The primary advantage of Eneloops is they don't self-discharge quickly. You can charge them today, and a year from now, they'll have an 80% charge. This compares to standard NiMh which will be dead in 6 weeks, sometimes sooner (MUCH sooner if they're old). The tradeoff for this is slightly lower capacity. But in a low-drain device like a keyboard or remote, it's a match made in heaven. The magic mouse is a bit of a different animal. It chews through batteries like nobody's business. Here Eneloops are actually a hindrance, due to their lower capacity. For my marketing guy (the heaviest magic mouse user), they last about 3 days, vs. 5 for the high-cap (2500Mah) Energizer rechargeables. So I appreciate the tip, and I'll throw one back at you: When you need to add some more batteries to your collection, get some Eneloops. They're identical, and less than half the price.