No more flat batteries - Connect the clips to your battery and plug into the mains and your car, bike, boat, mower or camper van will always be ready to start. The Pulse Master will maintain the charge any 12 volt lead-acid or Gel battery, sealed or not. It can be used with the clips permanently connected to your battery terminals, (perfect if your battery is hard to reach), or you can use it with the battery removed. The Pulse Master lead can be discretely placed for convenience, simply plug in to the mains supply, knowing that your battery will be kept in good condition until next time you need it. Unused batteries can lose up to 50% of their charge within 2 weeks; if they are allowed to totally discharge they may never charge again. The Pulse Master allows the battery to rest for a period then gives a pulse to make a full charge. The pulse cleans the plates leaving the battery with full starting capacity. Can be left on the battery indefinitely. Full short circuit protection and minimal running costs ensure great value. Pleas note , this is not a high current fast charger Read \" How-To Maintain Car Battery Life \" from Technical Articles for some useful tips to keep your car battery stays healthy.