This 20V MAX* Lithium Ion Double Battery Pack provides great value for the customer. This battery holds a charge for up to 18 months and can be used on a variety of Black & Decker power and lawn & garden tools. With the double packed offering, there is one battery to use on one of your tools, and another battery to keep charged for continuous use.

The LBXR20-OPE2 20-Volt Lithium Ion Cordless Battery in Use on Black and Decker Products

(2) 20-Volt Max Lithium Ion pack with 1.5Ah for extended runtime
Lithium Battery Technology
Lightweight, Long Life, no Memory Effect
Compatible with Black & Decker 20V Max Lithium Ion Cordless power and lawn & garden tools
Holds a charge for up to 18 months

http://www.amazon.com/Black-Decke...B00AVQEBSU