Special Features:

Small battery charger, tm 11809a-oi, acoustic hailing devic (mad 2bvt)

Properties:

A device consisting of one or more components utilizing an alternating or direct current source to reactivate batteries in which reversible chemical reactions occur. Use only for devices containing resistors, metallic, or electronic type rectifiers or vibrators and which are specifically designed for the purpose of charging batteries. May include filters, meters, load contactor and alarm circuits. Includes battery charging switchboards which are supplied with integral or external means of rectification.