Amazon.com: Synergy Digital Flashlight Battery, Works with Maglite ESR4EE3060 Flashlight, (Ni-CD, 6V, 2500 mAh) Ultra High Capacity Battery : Tools & Home Improvement
Mighty Max Battery 6V 12AH F2 SLA Replacement Battery for Streamlite / Maglite Litebox ML12-6F300726 | Zoro
Rechargeable 1/2D 6V Battery for Maglite LED Flashlight 108-000-439 108-439 9032 | eBay