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 resolder the Micro-USB back on to the board.
I, however, AM capable of resoldering 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, but I just want to clarify my assumptions before I go and set the board on fire.
Currently, the board is powered by a (dead) 3.7v, + 300mAh battery (as read off of the back of the battery). I want to replace this with a 3.7v 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, since the board should have been designed with some redundancy in mind for voltage drops and such. Thus, I was curious if a 3v 1a 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? Thanks in advance!