We do recommend a lithium battery for their lighter weights and better performance, as they don't lose power towards the end of their session.

Small Lithium Battery
Large Lithium BatteryStandard Battery
Battery Specs Lithium LiFePO4 12Ah Lithium LiFePO4 18Ah Sealed Lead Acid 20Ah
Weight 1.2 kg 2.3 kg 6 kg
Play Time 2 - 5 hours 3 - 8 hours 3 - 8 hours
Cycle Life > 2,000 charges > 2,000 charges 250 charges
Recharge Time 3 hours 4 hours 11 hours
Warranty 3 years 3 years 6 months