I have a currently dead Bluetooth speaker that had a Micro-USB port that fell off. The battery can no longer be charged and I'm not skilled enough with a soldering iron to re-solder the Micro-USB back on to the board.
However, I am capable of re-soldering the large battery leads with that of the positive and negative leads of a stripped power brick. Since the speaker doesn't move all that often in the first place, I figure this is an adequate solution.
I'm curious what kind of pitfalls I should avoid when doing this process. I have basic knowledge of electronic components, so I'm not so worried about that. I just want to clarify my assumptions before I go and set the board on fire.
Currently, the board is powered by a (dead) 3.7 V 300 mAh battery, as read off of the back of the battery. I want to replace this with a 3.7 V power supply.
However, I cannot seem to find one that matches these specs exactly. Since the power output is so small, and since it was a battery powered device, my assumption is the specs don't need to be exact. The board should have been designed with some redundancy in mind for voltage drops and such. Thus I was curious if a 3 V 1 A power brick would be sufficient to power this thing and not completely fry it.
Is my understanding of electronics right here or will I run the risk of breaking everything going this route?