Replacement Battery for Eufy S330 S230 S220 E330, 10500mAh Li-ion Battery Compatible with eufyCam S4, eufy Smart Drop Video, Smart Door Lock, T8520 T8520S T8520J11 T8531 E8531JY1 T8520T11
Replacement Battery for Eufy S330 S230 S220 E330, 10500mAh Li-ion Battery Compatible with eufyCam S4, eufy Smart Drop Video, Smart Door Lock, T8520 T8520S T8520J11 T8531 E8531JY1 T8520T11
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About This
- Full Compatibility: POEOSAS battery is fully compatible with eufy S330, S230, E330, S231 Video Smart Lock 3-in-1 and eufyCam S4, T8520 T8520S T8520J11 T8531 E8531JY1 T8520T11. It's a direct replacement for the original battery, ensuring perfect fit and function
- High Capacity & Specifications: With a 10500mAh capacity and 3.6/3.7V voltage, this lithium-ion battery for eufy replacemnet battery(77.5×59×21mm, 170g) provides extended power for your smart lock, reducing how often you need to recharge
- Charging indicator status: Flashing green indicates charging in progress; steady green indicates fully charged. LED indicator E to F four-segment status: E indicates low battery; Findicates nearly full charge.
- Built-in Safety Protection: Made with Grade A+ cells, this battery includes multiple protections: Over-Charge, Over-Discharge, Short-Circuit, and Over-Temperature protection for complete peace of mind.
- Uninterrupted Power Backup: Keep an extra battery for instant swaps when your smart lock runs low. Ensure your home security remains active without any downtime for charging
Overview
- Number of Batteries : 1 A batteries required. (included)
- Brand : POEOSAS
- Battery Cell Composition : Lithium Ion
- Battery Capacity : 10500 Milliamp Hours
- Recommended Uses For Product : For eufy S330 S230 S220 E330 Video Smart Lock 3-in-1 Doorbell battery

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SMART HOME FAQ
Yes — many modern devices support multiple platforms.
Matter-certified devices can work across Alexa, Google Home, and Apple HomeKit at the same time.
Not always.
Smart bulbs, plugs, cameras, and video doorbells are often easy DIY installations, while full security systems may need professional setup.
Many devices still work manually or through local control.
You may lose remote app access, but locks, lights, and thermostats often continue basic functions.
Security depends on the device and setup.
Use strong passwords, trusted brands, firmware updates, and secure Wi-Fi for better protection. Privacy and unauthorized access are common concerns in smart homes.
Most homeowners start with:
Smart Security Cameras
Smart Door Locks
Smart Thermostats
Smart Plugs
Video Doorbells
Yes.
Smart thermostats and smart plugs help reduce wasted energy by automating heating, cooling, and power usage.
It depends on your ecosystem.
Alexa → widest compatibility
Google Home → strong for Android users
Apple HomeKit → best privacy
Home Assistant → advanced control
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