A lamp you put down exactly where it’s needed – on the patio table, by the bathtub, on the windowsill – with no hunting for a socket and no extension lead tangling underfoot. It sounds like the obvious choice, until it turns out that after two seasons the battery holds half of what it did at the start and the lamp glows dimmer than a child’s night light. In this guide we compare rechargeable lamps with corded ones honestly: what you really gain, what you give up, how long the battery lives and in which places around the home (and beyond) a cordless lamp is unbeatable.