{"product_id":"13500mah-replacement-battery-400-for-jbl-partybox-stage-320-and-xtreme","title":"13500mAh Replacement Battery 400 for JBL PartyBox Stage 320 and Xtreme","description":"\u003cp\u003eOur review of the 13500mAh Replacement Battery 400 finds it best for owners of the JBL PartyBox Stage 320 or JBL Xtreme 4 who need a reliable, long-running spare battery. It excels at extending playtime with a high 13500mAh capacity and straightforward LED charging indicators, and it ships with a USB A to C cable for fast, convenient recharging. If the priority is simple swap-in replacement power that restores long listening sessions without complicated setup, this battery delivers that core promise well.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh capacity:\u003c\/strong\u003e The 13500mAh (99.9Wh) rating provides noticeably longer playback so users can run a speaker through extended events without frequent recharges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast charge ready:\u003c\/strong\u003e Included USB Type A to Type C cable lets you recharge from a portable power bank or wall charger quickly and is also compatible with the original battery charger.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible charging status:\u003c\/strong\u003e The LED indicators clearly show progress with green for charging and red for fully charged, so you always know when the battery is ready.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple replacement:\u003c\/strong\u003e The battery installs via the rear compartment on the PartyBox Stage 320 and by unscrewing the top cover on the Xtreme 4, making swaps straightforward for most users.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong runtime:\u003c\/strong\u003e Rated to deliver up to 18 hours of playtime per battery, allowing parties or long sessions to continue with minimal interruption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis battery is ideal for people who already own a JBL PartyBox Stage 320 or JBL Xtreme 4 and want a high-capacity spare to extend playback during gatherings, outdoor use, or long work sessions. It suits DJs, event hosts, and anyone who values straightforward replacement and long runtime over wireless charging features.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users whose speaker model is different from the two listed, and buyers seeking a battery with a smaller, exact OEM form factor; a few customers noted the size is bulkier than original cells, so check fit before purchasing if space is tight.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLong-lasting 13500mAh capacity gives up to 18 hours of playtime per charge.\u003c\/li\u003e\n\u003cli\u003eFast charging via included USB A to C cable and compatibility with original chargers.\u003c\/li\u003e\n\u003cli\u003eClear LED indicators make charge status easy to monitor.\u003c\/li\u003e\n\u003cli\u003eEasy to replace in supported speaker models, restoring hours of use quickly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSize can be slightly larger or bulkier than the original battery, so fit may be mixed for some users.\u003c\/li\u003e\n\u003cli\u003eOnly compatible with the PartyBox Stage 320 and Xtreme 4, not a universal speaker battery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e13500mAh \/ 99.9Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible models\u003c\/td\u003e\n\u003ctd\u003eJBL PartyBox Stage 320; JBL Xtreme 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded cable\u003c\/td\u003e\n\u003ctd\u003eUSB Type A to Type C charging cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003eLED: green charging, red fully charged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e12-month replacement exchange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 13500mAh Replacement Battery 400 is a practical, cost-effective way to restore long runtime to a PartyBox Stage 320 or Xtreme 4 without fuss. It offers reliable charge indicators, fast recharging with the included cable, and clearly targets users who need extended playback rather than a perfect OEM fit. Given the capacity and included support, it represents good value for owners who need dependable backup power.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this battery work in any JBL speaker?\u003c\/strong\u003e\u003cbr\u003eIt is designed specifically for the PartyBox Stage 320 and Xtreme 4 and should not be used in other models without confirmation of compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does a full charge last?\u003c\/strong\u003e\u003cbr\u003eRated runtime is up to 18 hours per battery under typical use, which lets many users run long events or combine two batteries for extended sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with a charger?\u003c\/strong\u003e\u003cbr\u003eThe package includes a USB Type A to Type C charging cable and is compatible with portable power banks and the original battery charger for the speaker.\u003c\/p\u003e","brand":"Fancy Buying","offers":[{"title":"Default Title","offer_id":48244709785819,"sku":"B0FFGK1P1Q","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Ed1nNth9L._AC_SL1500.jpg?v=1771098550","url":"https:\/\/gearmusthave.com\/products\/13500mah-replacement-battery-400-for-jbl-partybox-stage-320-and-xtreme","provider":"GearMustHave","version":"1.0","type":"link"}