Lithium batteries are quite expensive but very good. Used in a digital camera the amount of pictures taken per battery or charge will be substantially higher than with ordinary alkaline batteries. They are available in AA, AAA, 6LR and most digital camera batteries. The shelf life is also very good so buy them now and use them well into the future. Ghargers are difficult to get and very expensive but a better bet now is to buy one of the many universal chargers. They are cheaper, and will charge all the batteries around the house and will even charge your batteries in the car.