DeWALT recently announced a new battery technology for their cordless power tools. It features a pouch-style lithium-ion battery instead of the cylindrical cells that are common to the industry. The pouch offers higher current output, better packing efficiency, and longer service life. The first instantiation of the new battery is a 1.7Ah version for their 20V tool line. I ordered a pair as soon as they went on sale in November and they finally arrived today. The new (5-cell) battery has less capacity than the current version (1.7Ah versus 2.0Ah), but is smaller, lighter, and can supply a higher current allowing the tool to perform better. It is obvious to me that DeWALT will follow this battery with a 15-cell FlexVolt (20/60V) version that will probably have a 5.1Ah capacity although nothing has been announced yet. Another logical version will be a 10-cell, 3.4Ah version.