It is the flow of electric charge i other words It is  best-known as the flow of electrons through conductors such as copper wires. Ray Export are leading in the Electricity, Electricity Manufacturer, Electricity Suppliers, Electricity India, Electricity Exporter, Educational Lab Equipment, Physics Lab Instruments, Physics Equipment.
AA size, Nickel Cadmium
AA size, Nickel Cadmium, maintenance free, sealed rechargeable cells 1.25Volt
  
Made of unbreakable plastic.
Box for 4 ‘AA’ size batteries. Made of unbreakable plastic.
  
Made of unbreakable plastic.
Box for 2 ‘AA’ size batteries. Made of unbreakable plastic.
  
Made of unbreakable plastic.
Box for 2 ‘C’ size batteries. Made of unbreakable plastic.
For charging batteries, maximum no. of batteries 2 x 6 V or 1 x 12 V, in the ventilated case with an ammeter. Complete with shrouded terminals and mains cable. 
For charging batteries, maximum no. of batteries 2 x 6 V or 1 x 12 V, in a ventilated case with an ammeter. Complete with shrouded terminals and mains cable. 
Battery Charger, 4 Amp.
For charging batteries, maximum no. of batteries 2 x 6 V or 1 x 12 V, in the ventilated case with an ammeter. Complete with shrouded terminals and mains cable. 
Battery Charger, 6 Amp. 
This convenient, fixed-voltage Battery Eliminator is designed to be safe
 and reliable source of low voltage, DC power. It is ideal for use in 
classrooms and substitutes for a wide variety of batteries including AA,
 AAA, C, D, and 9-volt types. Allows teachers to conduct experiments 
requiring a variety of direct voltages while avoiding the decreased 
characteristics of dry cells
Pipette type, comprising a rubber squeeze bulb, glass float calibrated having colored zones for charged, partly charged.
Pipette
 type, comprising glass float calibrated having colored zones for 
charged, partly charged and uncharged conditions. Compressible bulb and 
rubber tube with fittings to glass body.
  
An insulated snap-on connector with 15 cm red and black leads.
An insulated snap-on connector with 15 cm red and black leads. 9 Volt - E type