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The JBL Charge 4 is a waterproof, Bluetooth capable speaker that additionally functions as a portable charger for smartphones. It is identifiable by its model number: CHARGE4S.

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Speaker turns itself on when not plugged in?

I bought this speaker because the seller said that it would not power on. I played around with some of the button combos and reset the jbl and now got it to power on. I tested it with service mode and made sure it is not in service mode. The problem is when I turn the speaker off while it is not charging, it automatically turns itself on (even if it isn't connected to anything via bluetooth). The weird thing is that when it is plugged in, it works fine and will stay off when turned off and works fine in general. I have tried all the different suggestions and even took the battery out, nothing has worked.

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We are having the exact same problem. Have you been able to determine if its at least a hardware or a software issue?

Our speaker is on the 3.0.0 firmware - some searching seems to show there is a 3.4.0 firmware that is available. What version is yours on?

When you pulled it apart to get to the battery did you have a look at the power buttons? Was there any possible physical fault, or was anything sticking?

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It doesn't seem to be a hardware issue and I updated my software and I am still having problems. There aren't a lot of answers on the internet besides letting it die, factory resetting it, taking it out of service mode (if it were somehow accidentally put into service mode), and just updating it. I might just try calling customer support but idk how much they would help me since I bought mine used on eBay.

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