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Lithium-Ion Battery
3.5 Hours for Full Recharge
Swappable BATTERYBOKS 3 for endless partying
Charge level visible by LED display
Compatible with all SOUNDBOKS
BATTERYBOKS 3.0, Replacement or back-up battery comptible with all SOUNDBOKS products, including the SOUNDBOKS 2.0, the SOUNDBOKS Gen.3, and the SOUNDBOKS Go. Battery life depends on the model in question and the average volume played on the speaker over the battery's charge. Average duration for the SOUNDBOKS Gen.3 speaker is 40 hours. Recharges in 4 hours.