The manual says that 'the initial charging time is 24 hours'. It says nothing about charging times in general use.
It also says that if 'battery charge is getting weak, let the battery run until it stops and recharge'. But another reviewer here says it's better for the batteries to charge it a few hours every day.
On the Vax website www.vax.co.uk/gator-handheld it gives the charging time as 24 hours.
All very confusing.
And I SO wish the charging light would tell you when it's fully charged.