5200mAh Li-ion S9 Battery Compatible for Viomi Robot Vacuum Cleaner S9 Accessories Spare Parts Charging Battery

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• ✅ High power technology, safer and longer life than NIMH batteries.
• ✅ Low self-discharge rate, less than 1% per month, no memory effect, free charge and discharge.
• ✅ 5200mAh large capacity, much larger than the galvanic battery, working time up to 2-3 hours, longer service life.
• ✅ Built-in latest PCB technology, can prevent battery overcharge, over discharge, over voltage, over current, over temperature.
• ✅ Adopts brand battery to extend working time and service life. Lithium-ion batteries retain 70 percent of their capacity after 1,000 cycles.