$68.99 EXTECH 1/2 AA Battery, 3.6V DC, Lithium, Button, 1,200 mAh, PK 2 - 4FJL3|42299 - Grainger
Xeno/Aricell 1/2 AA Size 3.6V Lithium Battery XL-050F 4 Pack + FREE SHIPPING! - Walmart.com 
LS14250MLB | Saft LS14250MLB 3.6V Lithium Thionyl Chloride 1/2 AA Battery, 1200mAh | Saft
