How to convert your home computer active speakers to use rechargeable battery power to take outdoor use

Single power can be changed to 12V battery power! The transformer output of the 2 wire removed, connected to the 12V battery positive, negative can, pay attention to the positive and negative electrodes to be clear. Dual power supply can also be changed, remove the transformer's output of the 3 wires, the positive and negative battery connected to the dual power supply of the two connectors, the negative that connector regardless of it, the input of the three audio wires (R .L . Ground) with three 100uf capacitors were disconnected, access to the audio input audio can be! The sound is just a little bit small, open up the AC sound. But the stereo with a subwoofer is very costly, the sound can be opened a little smaller also save power to come!