DIY Repair for Swollen Battery Bluetooth Speaker
A waterproof Bluetooth speaker with a swollen battery and aging speaker edges—how can you take it apart and fix it without buying a new waterproof Bluetooth speaker? If this sounds interesting to you, keep reading.
As shown in the picture below, this is the Melery waterproof Bluetooth speaker that we'll be DIY-ing in this article. This speaker has been in storage for a long time, the battery has swollen, and the speaker edges are worn out.
This Bluetooth speaker supports both Bluetooth and AUX, and the Bluetooth uses the SBC protocol.
First, you need to remove the front cover. Even though the speaker looks intact on the outside, playing at high volume for a while will eventually damage it.
Next, you need to connect a 18650 battery to test whether the functions are working properly.
Then, observe a few key chips. The 4056 charging chip and its location are shown in the picture above.
The FT2820 Class-G amplifier and its location are shown in the picture above. According to its datasheet: the FT2820 is a high-efficiency 4W Class-G audio power amplifier designed for battery-powered portable devices. With a 4.2V supply, it can deliver a maximum output of 4W into a 4Ω load at 10% THD+N in Non-ALC mode, or a constant 3.2W output at 0.5% THD+N in ALC mode.
So, this supports a 3Ω speaker, with a max output of 4.6W. The original speaker in this Bluetooth speaker is 4Ω 5W, but here you could choose to replace it with a 3Ω 5W speaker.
The storage chip and its location are shown in the picture above.
The ATS2815, as shown above, is a Bluetooth audio SoC that supports stereo Bluetooth playback, AUX IN, FM radio, and other functions.
It supports quite a few functions, though its specs are a bit outdated.
Next, you need to prepare a new speaker, then replace the old speaker and battery with the new ones.
This speaker truly has waterproof functionality; the ports and the lanyard each have their own sealed space.
Finally, put the casing back on, and your speaker is repaired.
Done.
