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Device & Refills
Why is my Rechargeable Refill is Not Full?
The amount of liquid in each rechargeable cartridge varies depending on the number of protection hours. For our larger cartridges, a 40-hour refill will be completely full, while a 36-hour refill will have slightly less liquid. For our smaller cartridges, the 18 hour will be about ½ full, the 12 hour will be about ¼ full, and the 8 hour will be just below ¼ full. Please click here for a visual chart of all refill levels.