Ebay offers DeWalt 20V/60V Max FlexVolt 9Ah Li-ion Battery 2-Pack for $247 (reg $350) after code with free shipping.

Apply Code: SUNNYSAVINGS

Product Description:
The dual-voltage 20V/60V MAX FLEXVOLT 9.0 Ah battery automatically changes voltage when you change tools, providing up to 6X runtime in 20V MAX tools and the power of corded in 60V MAX and 120V MAX tools. Take on tough jobs with this battery because patented technology and large format cells mean it runs cooler than the leading competitor 9.0 Ah battery pack under a constant discharge. This is the battery for FLEXVOLT power and long runtime. Features

• Dual-voltage for ultimate flexibility
• 180 watt hours of energy in each battery pack. Get 360 watt hours when using (2) FLEXVOLT 9.0 Ah batteries in 120V MAX tools
• 6X runtime when used in a 20V MAX tools
• Runs cooler than leading competitor 9.0 Ah battery for better efficiency
• Compatible with all 20V MAX chargers
• Compatible with all 20V MAX, 60V MAX, and 120V MAX tools and products
• Silicone encapsulated module helps keep dust and debris out
• Operates in outside temperatures down to 0-DegreesF
• LED charge status display on battery

What's in The Box

• (2) 20-Volt/60-Volt 9.0Ah FLEXVOLT Lithium-Ion Battery
• Owner's Manual

Warranty

• 2-Year Limited Factory Warranty
• 30 Day Satisfaction Guaranteed