Ue Boom Charge Light Flashing Fast

flashing lights indicate charge level roughly.

Awesome sound. Best speaker I own. Out does Bose sound link and Ue boom.

As many others mentioned in the reviews, these batteries are now new old stock, as the newest ones were made in 2022 and will arrive completely discharged. DO NOT give up on them - the charger will initially show an error (chamber and calibration light flashing) - keep taking the battery off and putting it back on, and eventually it will start to charge. The key is to not leave it in the charger if the charger is showing the error code, you have to remove and replace the battery until the charger shows that it is charging (chamber light and 50% light flashing). After a few hours the 50% light should glow solid and 80% should start flashing, and eventually it will charge fully

Does its job. I like how the flashing of the lights lets you know where you are in the charge cycle.

Works great. The flashing lights are an easy way to see how the charge is progressing.

UE boom's bluetooth wireless speakers never disapoint. It's my 3rd one in 10 years, and I've always been satisfied.

I wanted a smaller speaker for my golf bag. I had a UE Boom in the bag previously. I will never put that heavy thing back in my bag.

Recently bought after comparing to UE Mega Boom and Sonos Roam. Pairs easily and sounds great. I also like that it floats. Feels very sturdy. Charged faster than some reviews I read - Charging is not a negative compared to others in its class...

but it is unsettling to have the upstream light flashing

Very good device but hardly fast speed and external light keep flashing green. But over all everything seem fine