I agree with hawgnman's suggestion on the rechargable's. If your buying disposable I'd recommend using lithum's and once you see the price of these little suckers [:'(] you'll agree re-chargable's are the way to go! Plain jane's will work but in the end you'll find your replacing batteries quickly or even ones that aren't truly dead just in case..it boils down to investment up front vs over time, IME it will safe you money in the longrun and peace of mind.