4.2V 1A Power Cord for Lithium Battery Quick Charger Fit Single String 3.7V 18650 Li-ion Pack Smart Charge with Charging Indicator Light and Full Stop 4.2volt 1000mA Supply Adapter

This is a lightweight AC, DC power supply which provides up to 1 amp of current at 4.2V.perfect to replace the common three-AA battery set often used to power LEDs on small models. One amp is plenty for that type of setup. The unit has a green LED to indicate that it is properly connected to the AC power. The input is 100-240 V AC 50/60 Hz and the output is DC 4.2V 1A(1000mA) MAX. The size of the DC plug is 5.5mmx2.1mm and it has a positive inside diameter and negative outer diameter. This adapter is the many kinds of protection functions it offers. It has over-current protection, over-voltage protection, overcharge protection, and short circuit protection. If any of these protections are triggered, the LED lights will flash red, alerting you to unplug the adapter and check for issues. The adapter is built with high-quality electronic components, which improve its service life and reliability. The outer shell is made of fire-resistant materials, PC + ABS, which can withstand high temperatures. Perfect for your needs, compatible for toy model aircraft, desk lamp, clock ,remote control airplanes, and electric cars. It is less than 1A, making it safe and reliable. This power supply adapter is for charging lithium ion batteries. It will supply a continuous 3.9volts and 3.97 volts to charge the battery. Then, it will take the battery up to full charge of 4.2 volts as the amperage draw drops. So, although, the 1-amp (1000mA) it does do a good job charging batteries, which is what it’s designed for. The indicator light goes from red to green when the battery is fully charged. This charger is for rechargeable Li-ion batteries only - suitable for: PLR-500 PLR-400 CB4