Need a reliable replacement charger? This 21V 1A universal lithium battery charger has you covered! With input voltage of 100-240V 50/60Hz, it works pretty much anywhere in the world - perfect for travelers. The output delivers steady 21V at 1A maximum current through compatible 5.5×2.5mm or 2.1mm plug jacks. The American standard plug is durable and conductive, while the approximately 1-meter long cable gives you decent reach. Safety features include overvoltage protection, overcurrent protection, temperature protection, overload protection, short circuit protection - basically all the protections you could want! The PC+ABS shell is flame retardant and environmentally friendly, with bold pure copper wire core for faster transmission. The red LED indicator lets you know when it's properly connected and working. Great for battery packs, beauty equipment, floor sweepers, aerial photography aircraft, medical equipment, infant monitors, CCTV cameras, and so much more. The compact design doesn't take up much space, and the build quality feels substantial, not cheap. If you have any issues, their customer service is available 24/7. Much more affordable than buying manufacturer-branded replacements, and just as reliable!