The phrase "an extra lead" is correct and usable in written English.
It can be used in contexts where you are referring to an additional lead, such as in sales, marketing, or project management.
Example: "We have generated an extra lead this week that could potentially increase our sales."
Alternatives: "an additional lead" or "a supplementary lead".
Such devices have an extra lead that uses a circuitous route to reach the otherwise hard-to-reach left ventricle.
If you want to connect it to your TV to watch films bought from Tesco's LoveFilm equivalent, Blinkbox, you can do so via its micro-HDMI slot, although again you'll need to buy an extra lead.
If available, take along an extra lead rope and a cell phone or 2-way radio.
No leads were unintentionally damaged and it was not necessary to extract any extra leads.
Phil Tufnell, BBC Test Match Special: "England will be slightly disappointed not to have a few runs extra lead and not take more than four wickets down.
Females struggle and attempt to throw the male off because, beyond certain frequency of mating they do not benefit from repeated frequent mating [ 22, 23] and carrying an extra load (male) may even lead to fitness costs for females [ 24- 26].
Bale earned himself plenty of credit during a strong first season in Madrid, notably with a sensational match-winner against Barcelona in the Copa del Rey final and a headed goal to give his team an extra time lead in the Champions League final against Atletico.
Bring some extra lead if it is a mechanical pencil.
If they are mechanical remember some extra lead, and if not, include a sharpener.
It does appear to offer some protection, however, during pregnancy by delaying the extra lead mobilized from bone and reducing the extra flux.
Estimates of extra lead flux mobilized were possible only for migrant subjects whose blood lead concentrations exhibited positive variations during the monitoring period (n = 10).
