JBL PartyBox Encore not charging: fixes in order

Quick answer: The PartyBox Encore charges only from the AC power cord that came with it, plugged into the back panel, not over USB. Use that cord in a working wall socket and charge for at least 3.5 hours. The light stripe flashes white slowly while charging and turns solid white when full.

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First, how it's meant to charge

The PartyBox Encore has a built-in battery that charges from AC mains power. Plug the supplied power cord into the AC input on the back panel and into a wall socket. JBL's manual says to use only the provided power cord. The USB port on the back is for charging your phone from the speaker; the speaker itself does not charge over USB.

A full charge takes about 3.5 hours.

Read the battery light

Flashing white slowly: charging.
Solid white across the whole light stripe: fully charged.
Flashing red quickly: battery low.

With the speaker on, press any button to show the battery level (20%, 50% or 100%).

The fixes, in order

1Use the original power cord

JBL warns that PartyBox speakers use a dedicated power input and shouldn't be charged with other cables or chargers. If the original cord is lost or damaged, get a replacement for your exact model from JBL.

2Push the cord all the way in

Check the cord is fully seated in the back panel. Make sure the port is dry before you plug in.

3Try a different wall socket

Plug straight into a wall socket rather than a power strip or extension, and try a socket in another room. This rules out the wiring where you are.

4Charge for longer

A battery that has run completely flat can take a while to show any light. Leave it on charge for several hours; JBL's general advice for charging problems is to charge overnight for at least 8 hours before deciding it's faulty.

5Check the port for looseness

If the plug wiggles in the AC input, or charging only works when you hold it at an angle, the input is damaged and needs a repair.

6Run it on AC power if the battery is flat

If the speaker won't turn on, the manual's own fix is to make sure the battery isn't drained and use it on AC power. If it plays on AC but never charges, the battery or charging circuit is the problem.

When to contact JBL

If none of these work, the battery may have reached the end of its life or the charging input may be damaged. Contact JBL support and tell them which steps you've tried. Don't open the speaker or replace the battery yourself: JBL says this voids the warranty.

What to tell support

Keep a short record of your exact device model, software or app version, the symptom or error text, and which steps you tried. Note what changed after each step. You can print this page for reference.

Do not include passwords, recovery codes or private account details in public comments.

Sources

Video by FixIt Mobile on YouTube. See the linked sources for current manufacturer guidance. Menu names and available features can vary by model and software version. How we check fixes.