Which Batttery charge indicator to Buy

[amol]

hi,
I bought this Battery charger http://www.onlineshop.com.sg/index.php?main_page=product_info&products_id=441 Sanyo Ni-MH 2500mAh battery. As I cannot make out how much charge is left over, can I know the best and low cost device that can tell me how much % charge is left over in the battery.

Thanks!!
Amol

[Chris Hawkins]

I don't think you can for a NiMH, since the voltage remains constant until it dies.