... charger for 4.2V,8.4,12.6,16.8V,21V,25.2V li-ion battery pack. Product Name: Univesal wall or desktop charger ... .5A, 2A,3A,4A,5A optional)- Full charing voltage: 4.2V,8.4V,12.6V,16.8V,21V,25.2V optional- Charging ... x H53mm or other dimensions- Compliance with UL,CE,RoHS,EMC We also provide 4.2V, 8.4V, 12.6V,16.8V, 21V ...