AVOID BEING STRANDED: Has your battery run flat because you've accidentally left the lights on? Perhaps it's reached the end of its life and needs a bit of a boost? Being stranded with a flat battery can happen to any motorist. Fortunately, you don't always have to rely on a combination of jumper cables and an accommodating friend/colleague, nor do you necessarily need to replace the unit. Automobile specialist Paul Kasker shows us how to use an Optimate battery charger, one of many available on the market.