Hello Mark, This is more of a customer acceptance issue in North America when handling DC powered battery chargers. Do you want NRTL Listing for product liability protection reasons? Do your customers expect it? If so, you may want to have your battery charger NRTL Listed as an accessory to your main product, and the battery charger would likely be tested to the same standard. An AHJ wandering the factory floor of one of your customers might look for an NRTL mark on the charger, but they also might be happy with the NRTL mark on the EPS. A strict reading of OSHA regulations would likely be interpreted to mean that any electrical product needs to be NRTL Listed, but this is generally not the case. Your cell phone has a built-in battery charger and it is almost certainly not NRTL Listed.
A 12 VDC charger with no radios would likely fall under the General Product Safety Directive in Europe. I would be advisable to have a report showing safety to the host product's applicable standard to demonstrate compliance with the essential requirements of the Directive. Having safety approval from a European NCB would again likely be a customer acceptance issue. If your host product has a built-in battery charger, I presume that you are already familiar with the energy requirements. These are proliferating in North America for battery chargers and can be more of a challenge to track than the safety requirements for the chargers. Ted Eckert Microsoft Corporation The opinions expressed are my own and do not necessarily reflect those of my employer. From: Schmidt, Mark [mailto:markschm...@xrite.com] Sent: Wednesday, September 20, 2017 7:38 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Battery Charger Hello Group, I am trying to understand which standard would be applicable for a single Li-on battery charger. It would be powered by an existing 12 VDC LPS that already has all the required regulatory evaluations and markings on it. We already use this EPS on many of the products that we currently have safety reports on and are Listed. This battery charger would be for charging an additional lithium-ion battery (7.4V, 2600 mAh) that we use with some of our existing products. Our products have their own charge circuitry but the marketing guys want to have an independent charger source so the end user can just pop in a fully charged battery when needed. Our devices are used on a lot of factory floors (battery powered). They typically only use the EPS to charge their battery in the device when the leave for the day or maybe at lunch or whatever. This new charger's construction would be a plastic (94V-1), operate at 12 VDC input, output ~8.4 VDC 1A for charging one battery pack at a time. The PCB would be FR4, 94V0 material. Standard center-pin/barrel type power plug from the LPS. It would be designed CEC compliant; some minor circuitry for charge control most protection is in the 2 cell battery pack. Would have LED indicator(s) for charge status. Size: approximately 5" x 3" x 2" Are there any battery charger standards that may be applicable? Does this battery charger need to be Listed or Recognized by NRTL. Any thoughts or inputs are welcome? Regards, Mark Please be advised that this email may contain confidential information. If you are not the intended recipient, please notify us by email by replying to the sender and delete this message. 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