Hello, i need some help with making diy bluetooth speaker. I already ordered TDA7492P 2x25W amplifier/bluetooth module. It works with 10-25V. What i need now is power suply (batteries), battery circuit protection and charging module. I am buying it all from ebay (except batteries which i already have). So can you help me with advices as to what to buy. I am thinking of ordering this protection board, i would use 6 batteries giving me 25.2V at full charge. But now i need a charging board that will handle 25V 2A and has got to have microusb. Any advices ?