Key benefits Reliable charging across 110–220V outlets: works with common household voltages for stable power. Optimized charging management reduces battery loss and helps prolong your vacuum cleaner's service life. Simple replacement or spare charger to keep your vacuum ready when you need it. Main functions and performance Provides consistent charging and power delivery within the 110–220V range. Manages charge to minimize battery wear and extend the vacuum's usable life. Compatibility Compatible with OKP models: K2, K3, K3A, K4, K5. Compatible with Lefant models: T700, M201, M210, M213, M213S. Use this charger as a direct replacement or spare for the listed OKP and Lefant vacuum cleaners. Practical use scenarios 1. Daily home cleaning: keep a spare charger in a living area so the vacuum is always charged for quick cleanups. 2. Longterm storage: use optimized charging management to maintain battery health when the vacuum is not used frequently. 3. Travel or second home: bring a reliable charger that supports 110–220V for consistent performance in varied outlets. Customer support and 30day policy and 12month for worry . For questions or support, click the seller store's 'ask a question' link in the right corner to contact the seller directly.