Features:

• Converts the GX519 (LCD monitor) into a portable unit
• Approximately 4 hours per charge
• Nickel metal hydride (NMIH) battery
• Recharges with your monitor's power adapter
• Compatible with GX5201, GX519

Editor Reviews:

Product Description:
Make your GX5201, GX5204 or GX5203 system completely wireless with this rechargeable monitor battery.

Compatible Systems:

• GX5201 - Wireles Color LCD Handheld Monitor & Camera
• GX5203 - Wireless Handheld Outdoor Color Security System
• GX5204 - Wireless Handheld Color Pinhole Camera

Rating : - Battery does not last too long
I had it charged and it might last two to three hours before i had to recharge the battery. I think its a great idea than having to use AA batteries, but the battery it self i was not impressed.