Check the listing for details. Backcountry Access BCA Alpride E2 Float Turbo Electric Avalanche Airbag Pack 25L. Condition: New. Listed at 1299.95 USD. BCA FLOAT E2 ELECTRIC AIRBAG PACKS // NONSTOP TRAVEL TO ALL DESTINATIONS / The new BCA Float E2 avalanche airbag packs use an Alpride E2 supercapacitor system to store energy that powers the compressor upon deployment. Supercapacitors store and release energy based on electromechanical properties rather than a chemical reaction like in rechargeable batteries. This makes supercapacitor performance much more reliable in cold temperatures. For the same reason, the energy stored in a supercapacitor releases faster when activated for deployment. FLOAT E2 - 25L TURBO / Our dedicated sled-specific Float E2 pack, the E2-25 Turbo offers multiple options for external shovel carry, as well as an insulated internal electronics pocket. Includes all our standard Float E2 features: waterproof coated nylon, side stash pocket, back stash zip, internal shovel/probe carry system, curved side access zip, hip belt pocket, and "cooling fin" backpanel ventilation. Available in two sizes: SM/MD or LG/XL. SPECIFICATIONS / Pack Volume: SM/MD - 1,281 Cubic Inches / 21 Liters (with System) MD/LG - 1,525 Cubic Inches / 25 Liters (with System) Weight: SM/MD - 6.2 LB / 2,812 G (with System) SM/MD - 3.7 LB / 1,678 G (without System) MD/LG - 6.26 LB / 2,839 G (with System) MD/LG - 3.75 LB / 1,700 G (without System) Materials: PU Coated Nylon 420D Ripstop PU Coated Nylon 210D Doubled Ripstop Lining - 100D Robic Dynatec WR Pux2 Zippers: YKK Zippers with DWR Coating Torso Size: SM/MD - 15" - 18" / 38.1 - 45.7 CM MD/LG - 17" - 21" / 43.1 - 53.3 CM Color: Tan, Black Warranty: 3-Year Limited AA BATTERIES FOR ADDITIONAL DEPLOYMENTS / In addition to the supercapacitor storage, you can install two AA batteries to allow for additional deployment in the field. The batteries also help keep the supercapacitors at full charge when not in use. AA alkaline batteries allow for one additional deployment and is capable of keeping the system charged for up to three months of normal use. AA lithium batteries allow for three additional deployments and is capable of keeping the system charged for up to five months of normal use. See the Float E2 User Manual for more information.