I'm doing a round trip between the US and the UK with Delta, and intend to take my laptop. Unfortunately, the battery recently began to stop holding charge: when I plug in the charger and turn on my laptop, it works fine, but as soon as I remove or turn off the charger my laptop shuts down.
Will I still be able to take my laptop onto the plane in hand luggage and/or hold luggage?
The reason I ask is because I've been on domestic flights where they've required smartphones/tablets/laptops to be at least 20% charged when boarding. Here is a somewhat old link regarding minimum charge of electronics on flights to the US.