You've reached a high level and begin placing more than oneĮnchantment on a weapon, the charges can drain extremely quickly after These problems become worse as your enchanting skill increases. The price of enchanted weapons also jumps significantly higher. You may have noticed the game engine bug that causes weaponĮnchantments to drain more charges after you save and reload the game. It is discussed in detail at this UESP wiki article here, complete with the formula on how it is computed: Skyrim: Enchanting Effects - Weapon Effects A 'Fortify Enchantment/Alchemy/Restoration' potion that you may have taken (Note that this could be abused to create ridiculously strong 'Fortify Enchantment' potions.Soul Trap -> Conjuration) (the more skill you have in Conjuration, the more times you can use Soul Trap before your weapon runs out of charge)

Your skill level in the school of magic used by the enchant (e.g.

The size of the soul gem used in enchanting the weapon.

The following factors affect the soul gem charge of weapons:

Skyrim item codes soul gem