Product details:

Dewalt DW9116 7.2V to 18V 1 Hour Battery Charger and (1) 18V DC9099 Battery - The Dewalt DW9116 battery charger can charge multiple Dewalt batteries and has a 3 stage charging system to maximize run time and extend battery life. The Dewalt 18V DC9099 batteries are the new low profile design 1.7ah batteries. The lightweight design of the DC9099 battery decreases the overall weight of the tool reducing user fatigue.