I use these at work daily at about 6 full hours of drilling 5 days a week. The tank display is not quite as accurate as the OEM batteries, but the capacity does in fact exceed substantially the original RYOBI 4Ah battery. I have purchased 4 of these batteries so far , 2 for home use and 2 for work,and could not complain even if I wanted to, HIGHLY recommended!
The battery came fully charged and worked properly. Well made comes with charge indicator lights that work properly and accurate. Made with Hard plastic materials and fits my M18 impact drill and my M18 drill/Driver with almost no play. Great value and replacement for your Milwaukee M18 tools. Just as good if not better then the OEM batteries. Will reorder again in the future.
These DCB200 batteries easily slip into my chargers and also slip seamlessly into all my tools. The initial battery life is outstanding. I have not used/recharged the batteries enough to speak to the long term reliability of the batteries but I have no reason to expect anything but superior life and quality.