The company claims that the smartwatch can offer a 40-day battery life.
Amazfit Bip S Fitness Smart Watch: 40 Day Battery Life 10 Sports Modes - Heart Rate - 1.28'' Display
amazfit: Huami launches water resistant Amazfit BIP S with sleep tracker at Rs 4,999 - The Economic Times
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Amazfit Bip S smartwatch review: Price and battery life will smoke the competition - CNET
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Buy Amazfit Bip S (Refurbished) Smart Watch @ ₹1499.0
Amazfit Bip S launches in India for 4,999 rupees (Update: Lite model too)
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What is your review of Amazfit smart watches? - Quora