These 550mAh AAA Phone Handset Batteries Infapower® rechargeable NiMh cordless telephone batteries. They are supplied in sets of 2 Cells suitable for one handset. They have a three year warranty.
The Infapower 550mAh AAA phone handset batteries are a top quality replacement for your original cordless handset batteries fitted by the manufacturer. These include the Panasonic HHR-55AAABU, Sanik 650mAh AAA and all other brands with a capacity from 500 to 600mAh They have been made specifically for your cordless phone. The 550mAh AAA Batteries by Infapower® will provide maximum standby and talk time. Should the mAh rating on your current battery be higher or lower by 50mAh it will not affect the function of your phone.
If you use a battery with a much higher capacity than your original battery then it will not charge properly in your phone. This will mean short talk time, and an over all decrees in useful life-span of your new batteries.
For more information see gmk batteries online.