AirSep Freestyle External Battery

*All battery purchases are final sale. There are no returns on batteries.* Stay unplugged longer with the AirSep Freestyle External Battery. It can be used as replacement for aging Freestyle batteries or as a convenient spare battery. The AirSep External Battery is rechargeable and uses Lithium-Ion technology. It will provide up to 6.5 hours of extra battery life for the Freestyle 3 and 5.25 of battery life for the Freestyle 5. They are compatible with the redesigned Freestyle 3 and Freestyle 5 and are available in a new color and provide clip-on option for easy transportation. The batteries can be charged at the same time in their personal charging dock separate from the unit. They are a great alternative for users who require more battery life for their portable unit. Each battery takes approximately 5 hours to recharge from 0-100%. With the Freestyle 3, the battery provides up to 6.5 hours on a setting of 1 and 3 hours on a setting of 3. Using the Freestyle 5 can give you up to 4.25