TecMate Optimate 3 Battery Charger Features Retains all the fully-automatic, 100 safe, easy-to-use characteristics of the two million OptiMates produced since 1995, but is now microprocessor-controlled, lighter and more efficient than ever Diagnoses, recovers, charges, tests and optimally maintains, automatically For batteries forgotten over the winter, OptiMate 3 will recover them from deep discharge and optimally recharge them it will check that the charge delivered is the best possible, then check how well the battery can retain the charge An all-in-one tool for 12V battery care at home or shop Comes with global input (100-240V) and is 33 more powerful than its predecessor Batteries' status can be checked at a glance OptiMate 3 will then maintain the battery at full charge safely for months at a time and extend its life by up to 400