Hello, after I have replaced the defective battery with a new one, I notice the following with my charger: Device tecMate – Optimate 3 – new battery: Banner BGTX30L When I connect the device, it goes immediately into the “charge mode”. The yellow indicator light is then on. However, after some time the green LED 5 (Test & Maintain ) flashes continuously. In the battery that was previously installed ( original HD ) the LED 5 did not flash but lit permanently. Lt. W This should probably be correct, because the device always checks whether charge is correct. (Workshop didn’t really know the charger) Unfortunately, I don’t find a German-language manual for the charger. I don’t really find anything about it in the net either – (maybe I’m too deppert for the right search 🙂 ) Maybe someone here has made an idea or at best the same or a similar experience.