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13500mAh replacement battery for JBL PartyBox Stage 320/Xtreme 4

Fancy Buying ★ 3.5/5 · ItemOracle Score Mid-Range

$50 USD
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13500mAh Replacement Battery 400 for JBL PartyBox Stage 320 and Xtreme 4 Portable Speaker - 7.4V 99.9Wh Rechargeable Lithium-ion Battery, Long-Lasting Power,Fast Charge, 1 Pack (Speaker Not Included)

Replacement 7.4V 13500mAh Li-ion battery for JBL PartyBox Stage 320 and Xtreme 4. Fast charging with USB-C; long playtime. Customer note mentions strong functionality and value, with some fit concerns

Highlights

  • high capacity battery
  • fast charging capability
  • multi-model compatibility

Pros

  • high capacity 13500mAh
  • fast charging via USB-C
  • compatible with multiple JBL models
  • long playtime potential
  • includes charging cable

Cons

  • mixed fit/compatibility opinions
  • slightly larger/bulkier than original

Best For

  • portable speaker maintenance
  • backup power for JBL speakers
  • replacement for extended play sessions
  • camping or outdoor events power
  • quick charge with portable charger
  • home audio setups

Features

  • Voltage: 7.4V and capacity: 13500mAh / 99.9Wh
  • Compatible with JBL PartyBox Stage 320 and Xtreme 4
  • Provides up to 18 hours of playback per charge
  • Includes USB Type A to Type C charging cable for fast charging
  • LED indicators show charging progress (green charging, red fully charged)

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