Cameron Sino Replacement Battery Compatible with Sportdog SAC54-13734

the sport dog sport trainer remote trainers SD 425 and SD 825 have proved to be effective in the toughest conditions due to their robust build quality and advanced features and by using lithium ion technology the remote transmitter and receiver collar only require a two hour charge making them usable for most of the time incidentally it is not harmful to let the unit charge for more than two hours to charge the remote transmitter lift the rubber cover protecting the charging jack connect one of the charger connectors and plug the charger into a standard 120 or 240 volt AC wall outlet charge the remote transmitter for two hours for the first charge and every charge thereafter the indicator light will be solid green when charging and flash once per second once the battery is completely charged when charging is complete replace the rubber cover to charge the receiver color lift the rubber