good charger can manage a battery better and tell you when it’s borked too.
I use one from 7dayshop that works fine – has leds telling you when its charging, has a discharge setting and flashes when the battery is dead and can do up to 8x AA or AAA at a time. But they dont sell it anymore. This one might be a good alternative
http://www.7dayshop.com/catalog/product_info.php?cPath=777_3&products_id=101059
In fact Ive just ordered some 7dayshop good-to-go to replace some worn out stock 7dayshop batteries which must be three years old.
the good to go batteries are their equivalent, unbranded, eneloop models.
http://www.7dayshop.com/catalog/product_info.php?cPath=777_3&products_id=107341
7dayshop “GOOD TO GO” are the similar/same in technology as Sanyo ENELOOP, Panasonic Infinium, Uniross Hybrio, GP Recyko, Sony Cycle Energy, Duracell Active Charge, Hama Ready 4 Power and Camlink’s Ready 2 Go batteries – Only Much Better Value of Course !!