eeTao AC/DC Adapter Charger Compatible with tietoc Mini Cordless Chainsaw 4 inch / 6 Inch Handheld Chain Saw 21V 2.0Ah Lithium-ion Battery Pack Fast Charging Power Supply Cord Cable PS Wall Home Mains PSU Compatible with tietoc Chainsaw 21V Battery 24.8V Charger 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 30-day return policy !!!Note: 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 eeTao AC/DC Adapter Charger Compatible with tietoc Mini Cordless Chainsaw 4 inch / 6 Inch Handheld Chain Saw 21V 2.0Ah Lithium-ion Battery Pack Fast Charging Power Supply Cord Cable PS Wall Home Mains PSU CECCCROHS 100-240