Well i think its a 1800 or less cause wat happen is i dont have my chager curently nd i went to a vape shop nd the guy charged it for me ..nd it dosent read the battery number its a white charger thats house 2 batterys that r 1800 or lower..cause i had the same charger nd it only has 2 lights one on each side..but it turns red wen its dead or low nd wen i came back after a couple hours he said it waz green but he said it will only last about 30mins or so..nd thats how it lasted...