The charger is suitable for charging two batteries at the same time. There are no problems with charging. However, the reliability of the design of the docking station leaves much to be desired. I can see from other reviews that the design has a major flaw in the spring loaded battery holder. The nib and holder popped out of the dock on first use. I only discovered the issue after the Revain return period, thankfully the Arlo Support Center agreed to send me a replacement (which led to my extra star). It's hard to believe that this flimsy spring design made its way into Arlo's OEM production. I hope the replacement has a better design. I would recommend Arlo to go with a simple plug-in charger rather than a flimsy "fancy" spring design.
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