Due to temperature changes and humidity, doors can become ‘warped’. This is common and more likely for older doors. If that happens, the deadbolt and the strike plate could be misaligned, so the deadbolt might not extend freely into the strike hole. As a result, there could be strong ‘friction’ as the deadbolt tries to extend. The friction between the bolt and the strike can impact the battery performance of Kevo Convert. More friction means that the motor needs to work harder to lock your door, so your battery life may be impacted. To improve your battery life, make sure you adjust your door prep for the least amount of friction possible. Follow the steps in the Warped Door Kit Installation Guide.