Not sure why this is not posted yet on CPSC, but both Babies"R"Us and Summer Infant have it posted on their websites:
Summer Infant recalls the batteries from their Slim and Secure Handheld Color Video Monitor. The battery can overheat and rupture -- the company has five reports of incidents involving some property damage, but no injuries.
The batteries are in video monitors sold from June 09 through May 10 and there is more information at Summer Infant's website about identifying affected units. Those who have the affected units can get a replacement battery from the company.
This is the second recall since August of overheating or malfunctioning monitors. The last recalls were in 2003. It appears that this might be a product class that needs additional scrutiny -- no one wants a fire or even a rupturing battery in a nursery! CPSC also issued an alert about monitor cord hazards last year.