Support Overview / Speakers / Accessories / JBL Battery 400
JBL Battery 400

JBL Battery 400

An easy-to-replace spare battery that's compatible with the JBL PartyBox Stage 320 and Xtreme 4 portable speaker

Getting started with your JBL Battery 400

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Product Specifications

Net Weight
350g / 0.77lbs
Gross Weight
404g / 0.89lbs
Product Dimension (W x H x D)
93 x 25.1 x 89.5mm / 3.66" x 1.0" x 3.5"
Packaging Dimension (W x H x D)
110 x 102 x 34mm, 4.33" x 4.02" x 1.38"
Model Name
FG4CELL21700G
Battery Type
Lithium-ion battery
Battery Capacity
7.2V / 9444mAh, 68Wh
Operating temperature
0 -45 ºc

Keep the party going twice as long with JBL Battery 400

Even the best parties have to end sometime, but your JBL PartyBox Stage 320 can keep the vibe going twice as long by having a spare JBL Battery 400 on hand. 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. Each battery has enough power for up to 18 hours of playtime, which means you could keep the party going for up to 36 hours. 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 wireless Bluetooth™speaker when it starts to degrade.Each battery comes in FSC-certified packaging printed with soy ink.

Keep the party going twice as long by having a spare JBL Battery 400 on hand. Just insert it into the battery slot in the back of your JBL PartyBox Stage 320 when the first one loses its charge. Each battery has enough power for up to 18 hours of playtime, which means you could keep the party going for up to 36 hours.
Give yourself the peace of mind that comes from a trustworthy, reliable JBL Battery 400 that's guaranteed to work with your speaker.
10 minutes fast charge will give your JBL PartyBox Stage 320 and Xtreme 4 an extra 2 hours of playtime.
Just use your JBL PartyBox app to check the health of your JBL PartyBox Stage 320's current battery. When the Battery State of Health (SOH) reading lets you know it's time, replacing the battery takes just seconds.
JBL Battery 400 is only compatible with the JBL PartyBox Stage 320 and JBL Xtreme 4 wireless Bluetooth™speaker. Other speakers in the JBL PartyBox series and JBL portable series have different battery requirements.

Images & Videos

JBL Battery 400 - Black - An easy-to-replace spare battery - Hero
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Hero
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 1
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 2
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 3
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 4
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 5
  • JBL Battery 400 - Black - An easy-to-replace spare battery - Detailshot 5

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