Specifications

Capacity and Voltage

Model	Voltage, nominal (V)	Voltage, min - max (V)	Capacity (Ah)	Capacity (Wh)
SL8 - Air	21.6	18 - 25.2	7.3	157
SL4 - Ground	21.6	18 - 25.2	4.1	86.4

Ambient Temperature	-20 °C to 50 °C
Battery Cell Temperature	10 °C to 50 °C
Charging Temp	0 °C to 50 °C
Weather	Moderate rain (~3 mm per minute)
Drop rating	1 meter
USB Power Delivery	60 Watts (Up to 3 A at the following voltages: 20, 15, 12, 9, 5)
Cell Chemistry	Lithium-Ion
Cell Type	SL8 : Samsung 40T SL4 : Lishen LR2170SF
Max Continuous Current (10 s)	SL8 : 80 A SL4 : 13.5A
Max Peak Current (1 s)	SL8 : 120 A SL4 : 20 A
Mass	SL8 : 1035 g SL4 : 600g

Transport

Airline Travel

Please consult local regulations.

*SL-4 model is not compatible with Astro.

Detail of FAA regulations here:

• https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7
• https://www.faa.gov/hazmat/packsafe/resources/media/Airline_passengers_and_batteries.pdf

Shipping

We’ve found that FedEx provides the easiest path to ship batteries. Their website has a search tool to find FedEx locations that can accept batteries can be found good shipments, go to https://www.fedex.com/locate > More... > Dangerous Goods Shipping > and Search in your area.

If you’d like to pack the batteries yourself, guidelines can be found in the UPS guide to safely packing batteries. Refer to the Lithium batteries section (SL batteries are classified UN3481). These guidelines are universal across shipping providers.