Hi all,

So I was at a festival last weekend and thought to my self when our overpriced bluetooth speaker died from battery failure that could make it better my self. Turns out, when I sobered up, it was a bit more difficult than I thought.

I found a BT-Amp on eBay (and amazon) called TDA7492P. It is quite awesome from the looks of it.

I have a couple of old speakers:
Impedance: 8Ohms
Input Power: 65Watts
Peak: 100W

I have found this power bank:
TalentCell
12V/6000mAh

Now, this power bank looks promising to my very noob eyes.

Question:
I want to be able to charge the battery of my wonderful bluetooth speaker and listen to music at the same time.

How can I achieve this?
1. Charge the battery with only one connected cable to the case.
2. Use battery as power source
3. Use wall power as source

Please have a look at the attachment

Can someone with experience and the proper knowhow help me out? Please!

 

Your battery is a Li-on type ,using 18650 cells, looking at various videos on youtube, the battery comes with a charger and Y lead for using whilst charging which means the charger will be giving out more current to power the load and battery at the same time.

 

Your battery is a Li-on type ,using 18650 cells, looking at various videos on youtube, the battery comes with a charger and Y lead for using whilst charging which means the charger will be giving out more current to power the load and battery at the same time.

Your battery is a Li-on type ,using 18650 cells, looking at various videos on youtube, the battery comes with a charger and Y lead for using whilst charging which means the charger will be giving out more current to power the load and battery at the same time.

Alright, so a Y-cable allows me to charge the battery (slowly) and use the speaker at the same time. That is what I'm looking for. Now, how do I actually connect it all up?

+ and - goes from the battery to the amplifier.
+ and - goes from the wall power through the AC/DC converter and to the battery
+ goes from the AC/DC converter "around" the battery and to the amp
- goes directly to the battery from the amp.

See image below.

I know this is a lot to ask, but would it be possible for one of you with the brains to do so draw up the connections? Thank you so much in advance!

 

All the +/- connections are in parallel together. the charger feeds both the battery and the speaker, when you unplug the charger the battery takes over.

 

All the +/- connections are in parallel together. the charger feeds both the battery and the speaker, when you unplug the charger the battery takes over.

So like this? (Attachment).

 

Yes..