The best value in hearing aids deserves the best value in hearing aid batteries! We offer the four primary sizes (10, 13, 312, 675) with some options. Eco-Gold Max is our own brand - the price and power make this our best value. Eco-Gold XLT are the same formula, but with longer tabs for easier use. Ecopack batteries have no tabs and dispense directly from the pack. And finally, the Rayovac name speaks for itself.