Hitachi HiKOKI 18V 2.5AH Battery lith -ion BSL1825

Hitachi rebranded to HiKOKI as of 1 October 2018 

Features:

Lightweight and compact allowing for lighter and more compact tools, reducing user fatigue and discomfort
All Lithium Ion Batteries feature multiple protection circuit that protects the battery & tool from overload, over heat, over discharge & over charge. 
The MPC immediately detects any abnormality, even in one cell.
Upon detecting an abnormality, the circuit is instantly broken and operation is stopped.

Includes:

1 x Hitachi / Hi Koki 2.5AH 18V Battery BSL1825