Here is a bit of info, just for reference:
They run around $65-$90 new, available on Amazon, or via some eBay sellers.
Manufacturer's link is here.
Manual (pdf) is here.
The battery isn't a typical battery -- but you can buy a replacement here (price as of this writing, $15). It looks like this:
You can also buy other accessories by going here, including:
A few other articles / reviews:
- brief overview
- another brief review
- this article reviews the AK-38 as well as a few other similar amps
A few videos about the AK-38:
- a short review of the AK-38
- a video showing several being used, including using a "Y" cable to hook 1 microphone to 2 AK-38s, which worked great
This little "article" has lots of links. In the future, some of them may become dead links. (Sorry 'bout that.) But hopefully, this will give you some useful info, some ideas, and encourage you to consider this little amp. And if you're a proclaimer of the glorious gospel of Jesus Christ, get one, and use it to the glory of God.
(Are you forgiven?)