Brand new and original Xfinity plus battery in its factory sealed retail box.

20 volt LI-ION battery with a large 4 amp/hour (AH), capacity.

Latest technology, new ULTRA, type 21700 cells were used in the manufacture of this battery.

Lithium-Ion chemistry.

This Xfinity Ultra series battery can power all current small and large tools of the Aldi's Ferrex range, that require the 20 Volt Xfinity type of batteries. Please check your tool for that it is made to accommodate Xfinity plus 20v batteries.

Please also note.

A. If your tool is of the earlier Workzone or Titanium range there could be a running compatibility issue (rare) with the new Ultra series of batteries, whereby battery switches off temporarily under its embedded self protection mechanism that prevents sudden, excessive discharge. ( it resets itself once is removed from tool). There is no known issues with any of the current Ferrex models.

B. The 4 AH Ultra series of batteries are built using the current, slimmer 21700 cells and as such their bodies differ from the earlier series in physical size. The actual body size of an 4AH Ultra battery measures (in mm) 133L x 80 W x 50 H, total, including the mounting rails. Both series of batteries employ an identical system of mounting and use same charger for recharging.