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Fitbit fb5036/14/2023 ![]() It will be rigorously tested by our technicians before being shipped to your hands. Each Fitbit FB503 battery has passed a series of safety certifications, such as CE, UL, ROHS, ISO9001/9002. With first-class quality assurance, the battery for Fitbit FB503 provides protections of voltage, short circuit, charging time, ESD, and so on. Being made of ABS plastic case and the original IC protection chip, it could give you the new experience of excellent durability. ![]() Our Fitbit FB503 batteries can be charged/discharged for at least 600 cycles. We offer a high-quality battery at a more reasonable price. ![]() The replacement battery for Fitbit FB503 from .uk will be your best choice. ![]()
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