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Battery Nokia BL-4B
The Nokia BL-4B is a slim, lightweight Lithium Polymer (Li‑Ion/Li‑Po) replacement battery designed for selected Nokia mobile phones. With a nominal voltage of 3.7 V and 500 mAh capacity, it offers reliable power to extend talk and standby time for compatible devices such as the Nokia 5000, Nokia 7500 Prism and Nokia N76.
This BL-4B battery delivers stable voltage and consistent performance in a compact form factor. Its slim profile and low weight make it easy to carry as a spare, while the 500 mAh capacity provides extended talk time compared with depleted cells. The battery is manufactured to meet Nokia specifications for compatibility and safe operation.
Switch off your phone before removing the old battery. Remove the back cover and take out the depleted battery, then insert the Nokia BL-4B matching the contact orientation. Replace the back cover and power on the device. Charge the battery fully before first use using the original or compatible charger designed for 3.7 V Li‑Po cells.
Store the battery in a cool, dry place and avoid exposure to high temperatures or moisture. Use chargers certified for Nokia devices or compatible Li‑Po chargers. Dispose of the battery in accordance with local regulations for electronic waste.
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