JBL Battery 400 with charging case swaps out in seconds, so your JBL 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, Xtreme 4 portable speaker and more. JBL Battery 400 with charging case swaps out in seconds, so your JBL PartyBox Stage 320 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 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 4 portable speaker and more when it starts to degrade. (*charging cable not included)