Since usage times vary based on the rope gear you're using, the power setting you choose, and whether you interact with audience members, a second battery is strongly suggested. (We can only ship one additional 2Ah battery due to lithium shipping regulations, but the units are capable of holding up to a 6Ah battery.)
 
The 3.2G/10L unit come with a 2Ah lithium-ion battery and a charging cable. The units are also compatible with Makita/Makita-style batteries. (Batteries below are not made by Makita–they charge an insane amount!) The additional batteries are not compatible with the charging cable for the included battery so you’ll need a charging block designed for Makita/Makita-style batteries. Each are also sold separately:
 
2Ah Batteries: $25 (max order is one (1) additional battery per lithium shipping requirements)
Charger: $35