Tanga has this 21-Pack Power Cell Extra Heavy Duty Batteries (choice of AA or AAA) for only $6.99 with FREE shipping.  These Power Cell batteries (21-pack) are the trusted choice for emergency equipment and consumer electronics. Power Cell’s heavy duty batteries feature secure seals that prevent leakage and corrosion. Because these batteries are securely sealed and date coded, they tend to have a longer shelf life than most other brands of battery. Power Cell has long produced reliable and lasting zinc carbon batteries. When you need high-performance for flashlights, cameras, remote controls or emergency equipment, this 21-pack of Power Cell heavy duty batteries is a safe choice.