charge is not started when a positive terminal does not touch it well, please push the positive terminal side until I hear a sound with "a snick". When charge carried out stops suddenly, it is caused by over-optimism of contact of the positive terminal equally. It is the battery charger for exclusive use of a nickel metal hydride battery, the nickel cadmium battery. Please never do the charge of an alkali dry cell and other batteries. I reverse – terminal) to the polar (+ terminal of the battery, and, please do not charge it. Please do not connect the electronic transformation meters. I disintegrate, and, please do not remodel it. Please do not touch it with wet hands. In addition, please refrain from the use at the place with much humidity. Please use it only indoors.