Replacement push button battery for your Joye 510-T eCigarette, mAh 280. These are genuine JoyeTech 510 products! It is a good idea to keep at least one spare Joye 510-T eCigarette battery on hand as a backup. These batteries also take the place of the original 510 Mega batteries, so you can use a regular 510 atomizer with these to optimize your battery life!