Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Works as advertised.

After buying and trying the new Milwaukee Lithium-Ion batteries and charger, I must say they worked flawlessly. Much better than the original ones. The charging time for the batteries is very quick. The run time on the battery is much better than the old Ni-Cad batteries.The performance of the charger and batteries exceeded my expectations. In fact I liked this product so well, I bought a set for my son-in-law for Christmas as he too was having battery problems with his Milwaukee18 volt drill.