A parcel depot provides each worker with a hand-held scanner. Each scanner is used for one 10-hour shift every day. It is not needed for the next 14 hours, when a mains electricity supply is available.
The table gives information about two batteries that could be used in the scanner.
| Feature | Non-rechargeable alkaline battery | Rechargeable battery |
|---|---|---|
| Cost of one battery | £1.40 | £18.00 |
| Operating time before the battery stops | 28 hours | 12 hours |
| Number of times the battery can be recharged | 0 | 900 |
| Time taken to return the scanner to use after the battery stops | 2 minutes | 3 hours |
| Mass of the battery | 72 g | 54 g |
Evaluate the two battery choices for the hand-held parcel scanner.
Use information from the table and the working pattern at the depot.
90 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries, 5.2.2a Fuel cells, and 5.2.2b Half equations for hydrogen fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.