JBL Battery 400 with charging case swaps out in seconds, so your PartyBox speaker can keep the party going twice as long

An easy-to-replace spare battery with charging case An easy-to-replace spare battery with charging case that's compatible with the JBL PartyBox Stage 320/330, Xtreme 4/5 portable speaker and more. JBL Battery 400 with charging case swaps out in seconds, so your JBL PartyBox Stage 320/330 can keep the party going twice as long. It also can replace the rechargeable battery inside a JBL Xtreme 4 portable speaker and more when it starts to degrade. Even the best parties have to end sometime, but your JBL PartyBox Stage 320/330 can keep the vibe going twice as long with JBL Battery 400. When your rechargeable battery is running out of juice, it takes just seconds to pop a fresh battery into the slot on the back panel. Meanwhile, the battery can recharge in the charging case. You can also charge your tablet or smartphone* with the convenient USB-C port on the case. Double the great times, and enjoy the peace of mind that comes with an official JBL battery. It also can replace the rechargeable battery inside a JBL Xtreme 5 portable speaker and more when it starts to degrade. (*charging cable not included)