UpBright 4.8V AC/DC Adapter Compatible with EMSI Flex-it Electrical Stimulation Tens Combination Unit Flex-TENS Muscle Stimulator T12121086 700mAh Ni-MH Battery Charger F048-004-W 4.8Vdc Power Supply - EMSI Flex-TENS Muscle Stimulator Power

• World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. UpBright 30 Days Refund. 24 Months Exchange. UpBright New Global 4.8V AC / DC Adapter Compatible with EMSI Flex-TENS Muscle Stimulator Unit T12121086 Electrodes 700 mAh 4.8V Ni-MH 700mAh 4.8VDC Rechargeable Battery Smart Charger for Ni-MH / Ni-Cd Rechargeable Battery Pack 4.8 Vdc 4.8VDC 400mA DC4.8V 0.4A 4.8 V Switching Class 2 Power Supply Cord Cable PS Battery Charger Mains PSU Compatible with: EMSI Flex-it Electrical Stimulation Tens Combination Unit. EMSI Model: F048-004-W Smart Charger for Ni-MH / Ni-Cd Battery Pack F048-004W F048004-W F048004W 4.8Vdc 400mA 4.8 V 0.4A Power Supply ⚠️!!!Note: If the battery pack expires and becomes invalid. Charge it and it will warm up. But it doesn't charge. In this case, you may need to replace it with a new rechargeable battery pack. (EMSI 4.8V Ni-MH AAA 700mAh Rechargeable battery pack is available on line.) ⚠️!!!Note: Rechargeable batteries don't last forever, the average battery last 1 to 2 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.