I actually think that they released an AA battery charger because of the retail stores. After the Apple staff ring up a person for a keyboard and mouse, they ca

I actually think that they released an AA battery charger because of the retail stores. After the Apple staff ring up a person for a keyboard and mouse, they can easily make the suggestion to purchase their rechargeable batteries. The performance for rechargeables vary quite a bit as well. Apple might be trying to control the all parts of the experience by providing good rechargeables.