I almost always would but I can't get 2 generic batteries for less than the price of one genuine so it's quite tempting!Buy genuine
we have genuine ones 4ah over 6 years old used a lot and still as good as the day we got them for that reason i would not buy anything other than genuine ones,These came direct from Dewalt for evaluation with impact wrench and that has been faultless,The Hitachi was absolute rubbish we had beforeI almost always would but I can't get 2 generic batteries for less than the price of one genuine so it's quite tempting!