Recently got an LP640, when you turn the ignition on its reading 11.5v and can drop to 10.9v before you start the engine. Battery charger reads 14.1v when fully charged but drops instantly when you turn the ignition on. Car starts fine and reads 14.1v when running but getting some electrical gremlins so going to put a new AGM battery on it anyway. Just wanted to check what other people get when they first turn the key. Will see what state the old battery is in when it comes out.