Engine 2014: Electricity

1. A Primary cell type batteries are not rechargeable, whereas secondary cell type storage batteries are rechargeable.
2. B Secondary cell type storage batteries are not rechargeable, whereas primary cell type batteries are rechargeable.
3. C Primary cell type batteries contain an electrolyte paste, whereas secondary cell storage batteries always contain acid.
4. D Primary cell type batteries contain an electrolyte paste, whereas secondary cell storage batteries always contain alkali.

Tip: press A-D to answer