Instruct: Classify Amazon reviews into positive or negative sentiment
Query: best battery system

I now own this 4 charger model as well as 2 of the 2 battery versions and they simply rock, dead to full charge in 15 min can not be beat I use then for flashlights and my car alarm which takes 1 AAA battery as well as all my remotes and when some battery get weak recharge is is quick and there even better out of the house as it easy to find an outlet on the road but hard to wait 8 hours for a normal charger but easy to wait 15 min for these puppysHowever I got one major issue on this Home/auto unit.The free car charger is not incuded and is a mail offer but it not quit free as there is a 3.99 mailing fee and the offer expried last january so the packageing is deceptive and now fradulant with the expired offer only found inside the packagingas there is on experation on the out side of the package nor mention of the shipping fee so I emailed rayovac and I will post a follow up when I have any more info.