Lights and Batteries

How to test battery health


  1. Posted on January 7th, 2019 by Rob Marshall
  2.   Several GEM members have called our technical helpline recently, asking why a battery that has a healthy voltage can seem to be unable start an engine from cold. A voltage test does not tell the whole story and this is why:   State of Charge vs. State of Health Taking a voltage reading will […]

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Why you need to replace old HID headlight bulbs


  1. Posted on December 4th, 2018 by Rob Marshall
  2.   One of the many advantages with High Intensity Discharge lamps, as opposed to filament bulbs, is that they last longer – or so we thought. As more cars have been equipped with them from new, it has been noticed that, while HIDs do not fail suddenly like a traditional filament light bulb, their output […]

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Ditch the trickle charger


  1. Posted on November 20th, 2018 by Rob Marshall
  2. At this time of year, many members enquire about charging their batteries externally over winter, using a mains-powered source. It is not a bad idea, especially if you cover many short journeys.   Ian Newham, Training Manger at GS-Yuasa Battery Sales UK Ltd., the market leader for vehicle and industrial batteries and one of the […]

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Batteries – can yours last the distance?


  1. Posted on February 22nd, 2018 by Rob Marshall
  2. It has been a while, since I blogged last on batteries, but the recent sudden cold weather snaps have prompted me to do so, because the weather is not only catching-out ailing parts but can also destroy healthy items, too. The effects of cold weather on batteries. Batteries work harder in low temperatures, especially as […]

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Lights – Driver intervention needed


  1. Posted on September 29th, 2017 by Rob Marshall
  2. As we are now well into the season of mists, I wish that some drivers could be told not to rely on automatic lights. I think that this is one reason why I am starting to see drivers on the early morning/school run commute, particularly, not realising that they are putting their lives (and those […]

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Car batteries ‘fuel’ lead demand


  1. Posted on April 7th, 2017 by Rob Marshall
  2.   Yesterday, I indulged in a spot of domestic tidying. Among the detritus within my garage were four large scrap car batteries, taken from various vehicles that I had owned over the years. Rather than handing them over to my local recycling depot, I deposited them at my nearest scrap metal yard, which handed me […]

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How to fit LED lighting to your car legally


  1. Posted on February 7th, 2017 by Rob Marshall
  2. In our last blog on the topic, we looked at why LED conversion bulbs are both illegal and dangerous, when fitted to vehicle exterior lamps. Here are the most common questions on the topic, fielded by GEM’s Technical Department:   1. New cars are fitted with LED lamps, why can I not install LED bulbs […]

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Avoid fitting illegal LED light bulbs to your car


  1. Posted on February 2nd, 2017 by Rob Marshall
  2. Who would have thought that Light Emitting Diodes would become so popular? As a schoolboy, I remember them being rather useless, except for the weird creations that barely made it outside of the Design and Technology classroom. Yet, 20 years later, LEDs have proven essential in reducing energy squandered by power-sapping filament light bulbs and […]

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Brighten up behind, GEM urges drivers using daytime running lights


  1. Posted on November 21st, 2016 by James Luckhurst
  2. ROAD SAFETY and breakdown organisation GEM Motoring Assist is encouraging motorists to ensure they’re as visible as possible at all times. The advice comes amid concern that many drivers may be inadvertently making themselves harder to spot from behind when daytime visibility is reduced, because they’re relying on automatic lighting systems and front-only daytime running […]

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Avoid the misery of a winter breakdown with some basic car maintenance


  1. Posted on November 8th, 2016 by GEM Motoring Assist
  2. ROAD SAFETY organisation GEM Motoring Assist is offering simple tips for drivers to ensure trouble-free journeys this winter. Giving some attention now to batteries, tyres, antifreeze, wipers, lights and other vehicle essentials is the best way of ensuring reliability in the months to come, says GEM. GEM road safety officer Neil Worth comments: “ The […]

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