What would typically overload the circuit? For example: our usual collection of electronics would be two iPhones, one netbook, 3 charging camera batteries
(You often wonder how we 'survived' without our electronics in the "old" days)
Recharging things is very low power. Using a blowdryer while your curling iron or flat iron is heating up and simultaneously powering a pc and a reading lamp or make-up mirror might push the limit.