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🔋 10500mAh ultra large capacity, doubling the battery life. It uses high-density lithium polymer battery cells, with a capacity 1.5 times that of the original factory battery. One charge can support the door lock to work continuously for 6-8 months, bidding farewell to the trouble of frequent charging
🎯 Accurate compatibility, plug and play perfect adaptation to Eufy Security series smart door locks: S330/E330/S230/S231/S220 Drop T8790/3-in-1 T8520/T8531, no additional tools required, replace original batteries directly
🛡️ Multiple safety protections, using worry free built-in overcharge/overdischarge/overcurrent/short circuit/overheating five protection systems, certified by UL, CE, FCC authoritative safety certifications, to safeguard your home safety
⚡ Efficient fast charging technology supports 5V/2A fast charging, which can fully charge 80% of the battery in 3.5 hours. Equipped with LED power indicator light, the charging status can be monitored at any time
💼 Professional after-sales service, quality assurance provides 12-month warranty service, 30 day no reason return or exchange.










