Don't Miss

Bulged And Stuck Lipo Battery Replaced In JBL Bluetooth Speaker FLIP4

By on July 8, 2023
Bulged And Stuck Lipo Battery Replaced In JBL Bluetooth Speaker FLIP4

A JBL Bluetooth Speaker model Flip4 was brought to me with the complaint that it had distortions and the battery backup was not enough. In order to remove this audio device, I took help from this video.

Various stages of ripping it open are shown in the following pictures:

bluetooth speaker repair

Please use control+scroll to zoom. From the last picture you can perhaps see where the battery was located. As it was stuck with sticky tapes and was on top of a couple of strip wires that interconnected the control switches, removing it was extremely difficult. I applied IPA on top and bottom of the battery and slowly released the bond by several repeated attempts.

But the battery had got bulged and was stuck in the slot tightly. I used a wooden piece that was resized to suit the slot and used mild hammering with another wooden plank to remove it. (Please never use any metal tools to remove the battery, as it can cause short, explosion and/or fire!)

battery bulged problem

As replacement battery was very costly, I ordered for two sets of AAA size NI-MH 1.2V 1100Mah cells to Amazon. (Of-course with the consent of the customer!)

infinite battery

I connected three cells in series and arranged it in such way so as to accommodate it inside the battery compartment of the unit. The output voltage was 3.6V instead of 3.7, which did not matter.

I clarified and confirmed with my techie friend before using this as I was a bit doubtful about the charging method used for Lipo. I put the unit for charging fully. Then when I tried, the device worked very well without any distortion even at full volume. Reassembled the unit (I had to replace a couple of strip wires as the original had got torn when removing the battery) and played it and let me share with you all that it was giving excellent quality audio output, which I never expected from a small system like this! Kudos to the designers!

Mission accomplished and satisfaction got added with vigour!

how to fix a broken bluetooth speaker


This article was prepared for you by Parasuraman Subramanian from India. He is 72 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.

Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments.

P.S-If you enjoyed reading this, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!

You may check on his previous article on Swing Motor Shaft Exchanged And Modified In A Nameless Bladeless Fan



  1. Mike

    July 8, 2023 at 9:34 am

    I don't think 3 x 1100 mAH in series will triple the mAH, it will be the same just the voltage is higher.

    • Parasuraman S

      July 8, 2023 at 11:05 am

      You are correct there! Thanks for the observation! My apologies for the mistake! Shall carry out correction!

  2. Albert van Bemmelen

    July 8, 2023 at 2:51 pm

    I guess that working from going from Lipo to Ni-MH is always safer than the other way around. Since Lipo is well known for bulging and the exploding danger.

    • Parasuraman S

      July 8, 2023 at 3:00 pm

      Many thanks for your expert observation and comments!

    • Tito Kanshulu

      July 8, 2023 at 8:33 pm

      Good job Sir. Thanks once again

      • Parasuraman S

        July 9, 2023 at 3:10 pm

        Many thanks!

  3. Beh

    July 8, 2023 at 6:09 pm

    Hi parasuraman
    Thank you so much for your very informative article.

    • Parasuraman S

      July 9, 2023 at 3:11 pm

      Many thanks for your comments!

  4. Arunkant L Pandit

    July 8, 2023 at 7:24 pm

    Battery removal was difficult task. Even opening the device is tricky as seen in the video. But you have successfully achieved the goal. Thanks for sharing.

    • Parasuraman S

      July 9, 2023 at 3:11 pm

      Many thanks for your comments!

  5. Yogesh Panchal

    July 9, 2023 at 12:26 am

    Ni-MH self discharge quickly when not in used.
    Sir giving you one Idea..... to keep bad Battery pack of any laptop you will Definitely find 3 good Li-Ion batteries out of 4 in side (Mostly 18650); which you can use for this types of repair.

    • Parasuraman S

      July 9, 2023 at 3:12 pm

      Many thanks for your comments and suggestions!

  6. Waleed Rishmawi

    July 9, 2023 at 12:27 am

    Excellent job my friend. Thanks for the info. Have a blessed day.

    • Parasuraman S

      July 9, 2023 at 3:13 pm

      Many thanks, dear friend!

  7. Imoudu.O

    July 9, 2023 at 5:24 am

    I think there are other lithium batteries with 3.7V 7800mAh (cylindrical)available,I use these to replace bad bluetooth speakers batteries.Using AAA batteries as replacement is new to me,moreover are they alkaline batteries?
    Thanks for sharing.

    • Parasuraman S

      July 9, 2023 at 3:15 pm

      Size is the problem. It won't fit. These are NI-MH batteries.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.