New Global 2-Prong AC / DC Adapter Compatible with PoolMr Model Manatee YM-S4-01 YM-S401 YMS4-01 YMS401 10000mAh 10Ah 10000 mAh 10 Ah Lithium ion Li-ion Liion Rechargeable Battery Pack 180W 182.5 Watt IPX8 Waterproof Wall Climbing Cordless Robotic Pool Cleaner Automatic Swimming Robot Vacuum Class 2 Switching Power Supply Cord Cable PS Charger Mains PSU (w/ 2-pin Connector) !!!Tips: Rechargeable batteries don't last forever, the average battery last 1 to 3 years. If the battery is old/dead, it will not accept a charge. But not charger's problem. If you're not sure whether battery or charger is dead or not. You must have a volt meter in order to tell whether or not a charger is working. Compatible with listing item ASIN: B0D1BTW47D -- Cordless Robotic Pool Cleaner - Automatic Pool Vacuum Robot with Wall Climbing - 120 Mins Runtime, Quad-Motor Powerful Suction, Self-Parking, for In Ground Pool Up to 1500 sq. ft, Black Compatible with listing item ASIN: B0D1BW2YTG -- Cordless Robotic Pool Cleaner - Automatic Pool Vacuum Robot with Wall Climbing - 120 Mins Runtime, Quad-Motor Powerful Suction, Self-Parking, for In Ground Pool Up to 1500 sq. ft, Beige Onerbl AC adapters are manufactured with the highest quality materials tested and designed to meet the power needs of your device. This power supply allows you to operate your device or charge its battery from electrical power outlets.This adapter converts AC power into the DC power required by your device. Onerbl adapters are great solution during travel.This adapter has been validated and tested to ensure it will work with your device.