Finally, I bought a sanyo Refresh quick charger. It is small and charging time is around 230 mins for 3-4 2300mAh batt. It is good charger but if I recomend then I will go for Sony one (Just pay more 3 dollars, if you bought it at SLS 3rd level, the Sony shop).. The reasons are..
1. The Sanyo charger charging time is slightly better than Sony about 20 mins diff. But the refresh time for Sanyo is 7.5hrs and Sony one is 4.5hrs only.
2. Sanyo charger only able to charge 2 AAA size batt. but Sony one able to charge 4 AAA batt with any positions.
3. The worse thing for my Sanyo charger is the adapter is attached to charger (It's good that you don't need to bring along the cable.) but the type is not the standard type. It will require to buy a "multiple socket adapter" separately.
4. With adapter attached, you will have inconvenience when you charge at the socket where it placed.
However, if you still want to go for Sanyo. Then go for East gear, bcoz SLS price is same and most are higher. Hope my comments is helpful for any one need to buy charger with batt AA or AAA.