Yustda AC/DC Adapter Compatible with Dolphin Niya Sonar 50 07.009.0003 Maytronics 21.9V 7800mAh Li-ion Battery SAT-3P6S-50 180W Cordless Robotic Vacuum Pool Cleaner Power Supply Charger Cord

(Note: !!! 21.9V is Pool Cleaner's battery voltage. !!! NOT charger's voltage.) New Global 2-Prong AC / DC Adapter Compatible with Maytronics Model Niya Sonar 50 07.009.0003 Sonar50 Dolphin 21.9V 7800mAh 170.82Wh DC21.9V 7.8Ah 170.82 Watt 21.9 Volt 7800 mAh 21.9 Volts 7.8 Ah 21.9VDC Lithium ion Li-ion Liion Rechargeable Battery Pack SAT-3P6S-50 SAT3P6S-50 SAT3P6S50 180W Powerful Suction Swimming Robot Cleaner Cordless Robotic Automatic Pool Vacuum (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. Charger/Adapter has total 10 Ft Long power cord. Safety Features: Over current protection; Total power protection; Over voltage protection; Short Circuit Protection. Manufactured with the highest quality materials. Certification: FCC, CE and RoHS. Compatible wtih: Dolphin Niya Sonar 50 07.009.0003 Maytronics 21.9V 7800mAh Li-ion Battery SAT-3P6S-50 180W Cordless Robotic Vacuum Pool Cleaner