These Dlyfull AA rechargeable batteries do the job just fine but they are not the most economical way to create or increase your supply of rechargeable batteries. If you are comparing 4 pack (such as this grouping) the Dlyfull's are competitive at about $2.50 per battery. But if you buy in larger quantities your price per battery will go down quite noticeably. Also there are some "kits" which include batteries and a charger that can also be a good way to purchase. So shop around for price, particularly if you are going to be using larger quantities of batteries or you also need a charger.
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