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Precise factory adaptation - developed based on 3D data of A11-07 original battery, seamlessly matching contact layout (22.2V voltage), compatible with intelligent power display and charging base functions, avoiding system false alarms. Power battery cell - using A-grade lithium-ion battery cells, with a cycle life of over 800 times (capacity retention ≥ 80%), 2C fast charging technology shortens charging and reduces your frequent waiting time for battery charging. Five fold safety protection - built-in overcharge/overdischarge/short circuit/high temperature/overcurrent protection chip, working temperature range of -20 ℃ to 60 ℃, stable operation in extreme environments. Ready to use design - snap on quick release interface, no tools or modifications required, installation can be completed by pressing with bare hands, suitable for battery replacement needs during vacuum cleaner operation Packaging content: 1 piece lithium-ion battery for vacuum cleaner (2500mAh, 55.5wh)