have been trying to charge a couple of batteries but nothing really works for above 1 amp charge rate, why so?

Your power supply is maxing out

oh right
bdw what does it mean? kind enough to give me a solution?

You will have to get a better power supply that is capable of supplying more current at the 12v. This topic has been discussed a number of times on the forum alongwith workable and efficient solutions, if you search for "INPUT VOL ERROR" in the search box.

http://www.rcindia.org/batteries-and-chargers/'input-vol-error'/

you're absolutely right, the ampere out was around 1amp, and the charge rate anything less that was working fine for me, any clue on which hobby store has a 12v adapter with an ampere out of atleast 5amps?

You can use a wide variety of adapter as long as the output current is as required; laptop adapters serve as good alternatives.
www.extremeelctronics.com has 5A supplies as well.

This one will work:
http://www.ebay.in/itm/201128525989

http://www.ebay.in/itm/Universal-12V-5Amp-60W-AC-DC-Power-Supply-Adapter-Charger-for-PC-LCD-Monitor-TV-/171395359126?pt=IN_Computer_Components&hash=item27e7f5a196