■Yes, it’s called self-discharge. Lithium-ion batteries lose about two per cent of their charge per month if left charged. This is because batteries are electrochemical, rather than purely electronic devices. That’s reflected in their names. In lithiumion batteries, ions of the element lithium move between electrodes, releasing electrical energy as they do so. They do this quickly on demand when we use our gadgets. But it can also happen when the battery is left alone.
AE