Amp Rechargeable

Amp Rechargeable
I need someone who's really good with amplifiers?

ok so i need to know which ones better:

http://cgi.ebay.com/Car-Motorcycle-12V-Mini-Hi-Fi-Audio-Stereo-Amplifier-/180674537322?pt=UK_AudioTVElectronics_HomeAudioHiFi_Amplifiers&hash=item2a110aa76a

http://cgi.ebay.com/Car-Motorcycle-12V-Mini-Hi-Fi-Audio-Stereo-Amplifier-5W-/150577785549?pt=Car_Amplifiers&hash=item230f22aacd

http://cgi.ebay.com/12V-Mini-Hi-Fi-Audio-Stereo-Amplifier-Mp3-Bass-Car-Home-/120686542930?pt=AU_Electronics_Audio_Amplifiers&hash=item1c197a8052

http://cgi.ebay.com/Lepai-TRIPATH-TA2020-Amp-Mini-Hi-Fi-Audio-Amplifier-/360353418952

I really like the last one the best but im not sure if it will work for what i need it for. I need to be able to power them by a 12v rechargeable battery and I know the first three can be powered by that, but idk about the last one cuz it says that it comes with "1 x 100-240V Power Supply." Does that mean that my 12v wont be able to power it? PLEASE HELP!

For the last one you need a 12V DC 2amp power supply. So be sure your 12v battery can provide 2amp, which for most of the batteries it will.

PA System Battery Tips and Troubleshooting | Rechargeable Batteries AC

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PowerStar® Replacement Power-Sonic PS-1290 12 Volt 9 Amp Hour Rechargeable SLA Battery (F2 Terminals)
PowerStar® Replacement Power-Sonic PS-1290 12 Volt 9 Amp Hour Rechargeable SLA Battery (F2 Terminals)
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BiXPower 153 Wh (42500mAh) Super High Capacity 12V & 19V External Rechargeable Battery Pack - BiXPower BP160
BiXPower 153 Wh (42500mAh) Super High Capacity 12V & 19V External Rechargeable Battery Pack - BiXPower BP160
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Super high capacity, long run time, external universal battery pack that can provides 12V or 19V DC power for laptop notebook computers, LED lights, medical equipments and other electronic devices. Made with high quality
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6 ~ 12 hours for laptops
210 hours for cell phone

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Make the Most of Your Mobile Lifestyle. Sleek, slim, and stylish - the PowerPack CC1800 rechargeable battery extends the life of your smartphone by up to one full charge. The ultra thin design resembles a credit card. The included Micro-USB cable plugs in to keep your Android smartphones charged, and also lets you easily recharge your Power Pack. iPhone users have the benefit of using their existi...
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ExpertPower Sealed Lead Acid Batteries are made with the highest quality of materials available. Our Lead Acid Batteries are typically used for: Home Alarm Systems, Uninterruptible Power Supply(UPS), Lighting Equipment, General Electronics, Home Security Systems, Emergency Systems, Medical Devices, Electric Scooters, Solar Collectors, Wheelchairs and many Other Applications. Whether it's the SECUR...