Used for large drones. Box of 8 batteries available. Batteries retail@over $300 each. This mAh is hard to find. $75.00 each or $500 for the lot. Batteries are rechargeable. Recharging unit not available, can be ordered online through Turbo Ace or similar vendor. I do not believe these were used much , if@all. Appear to be new. Boss said " clear the clutter", hence the great pricing. Shipping can be provided, at your cost. Caution, these are about 2.5 pounds each and will need to be shipped via ground. Located in Scottsdale, AZ.