How long douse jbl need to charge before using? bluetooth speaker?

Try doing default factory settings.
Step 1. Press the "Power" button located on the top center part of your JBL Charge 4 Bluetooth speaker. The speaker will be powered on when the LED backlight under the Power button is lit.
Step 2. Hold down the "Bluetooth" and "Volume Up" buttons at the same time for roughly three seconds. The Volume Up button looks like a plus sign. Additionally, it's important to hold down the "Bluetooth" button in the center of the device next to the Power button, as it's easier to hold down. After three seconds, the LED ring around the Power and Bluetooth buttons will briefly light up before the JBL Charge 4 powers down.
Step 3. Press the "Power" button again to turn the JBL Charge 4 Bluetooth speaker back on. The Charge 4 will instantly turn on in Discovery mode, with the Bluetooth LED blinking on and off, and the speaker making a pinging sound. This confirms that you've successfully reset your JBL Charge 4 to its default factory settings. You'll need to pair or re-pair any devices you want to play audio through the JBL Charge 4 speakers with the device.

If your speaker supports Bluetooth. Use the screenshots below to connect to your device. If not, you can use a wire from your iPhone to the speaker. it looks like the last screenshot below.

On your phone...
Go to Settings and then Bluetooth. Turn on Bluetooth. Look for your JBL device under "OTHER DEVICES" and tap on it to connect.
On your speaker.
Turn on pairing mode for your JBL deivce
Find your JBL device on your phone or laptop and pair them
Confirm successful pairing
JBL speakers typically have a dedicated Bluetooth button to use to pair your speaker.

JBL Xtreme Portable Wireless Bluetooth Speaker (Black) this? see reviews on the stinky batteries, https://www.amazon.com/JBL-Portable-Wireless-Bluetooth-Speaker/dp/B014QQAM8I/ref=sr_1_2?hvadid=78615152469393&hvbmt=be&hvdev=c&hvqmt=e&keywords=jbl%2Bextreme&qid=1564161475&s=gateway&sr=8-2&th=1

unpair jbl speaker in windows 10
then put jbl speaker into pairing mode
then on windows 10 pair speaker in bluetooth settings
then
test speaker to see / hear if it now works

Problem connecting Windows 8.1 pc to JBL Charge bluetooth speaker ...

answers.microsoft.com/.../windows/.../windows8...connecting-windows...

When I try to connect the pc through Bluetooth to the above wireless speaker ... 2) What is the model of the JBL Charge Bluetooth speaker? ..... I am already able to play music from my iPhone 5 on this speaker via Bluetooth with no problems.

Cannot connect JBL Charge Bluetooth - Networking, Internet ...

en.community.dell.com/support.../network...wireless/f/.../t/19525571

Dell
Sep 22, 2013 - 16 posts - ‎11 authors
23 Replies; 16 Subscribers; Postedover 2 years ago ... I'm trying to connect my JBL Charge Speaker bluetooth with my Dell Studio 15 laptop to listen .... I am having the same problem, did you find a fix for this? ... not support audio output, then you need to add a Bluetooth adapter which includes a CD driver.

JBL Charge 2 ' Portable Bluetooth Speaker with USB Charger

www.jbl.com > Wireless > Portable Bluetooth Speakers

JBL
Rating: 4.3 - ‎110 reviews
Most popular JBL Charge 2 wireless portable speaker can charge any devices via USB... You can easily connect Charge 2 to any Bluetooth-enabled device by giving the portable's ..... Charge with proper charger or a USB port form computer.

JBL Xtreme ' Splashproof Bluetooth Speaker with ... - JBL.com

www.jbl.com > Wireless > Portable Bluetooth Speakers

JBL
Rating: 4.7 - ‎35 reviews
Splashproof JBL Xtreme Bluetooth speaker with explosive sound, 15 hours playtime, dual USB port can link multiple speakers and ... Product Specs & Manuals.

JBL Xtreme ' Splashproof Bluetooth Speaker with Powerful ...

uk.jbl.com > Wireless > Portables

JBL
Rating: 4.8 - ‎36 reviews
Splashproof JBL Xtreme Bluetooth speaker with explosive sound, 15 hours ... http://uk.jbl.com/bluetooth-portables/XTREME.html? ... Product Specs & Manuals.

Yes, follow this sequence:
1. Turn the device on
2. Press the call (phone icon) and the volume up (+) button at the same time and keep them pressed. After a few seconds the speaker will shut down.
3. Release the buttons.
4. Turn the speaker back on. It will automatically enter into search mode... And there you are, memory wiped up.
Good luck.

First, it has to be in pairing mode for the computer to find it. Second, the computer is looking for a response from the speaker. Try pushing the Bluetooth button on the speaker. Also, you may not need to provide a key. Does the computer menu have an option for no key?

You will need to reread the JBL directions. Most portable systems are fairly straigt forward. There usually a button with the bluetooth symbol. Press and hold till it starts blinking. Then go into settings, bluetooh on your S5 and look for the JBL.

You might need a driver to use the device on your laptop.