Has anyone tried a VHBW battery? Historically they seem to be a reputable German company. Think I may give them a try for a new battery. I don't fancy risking a fake with import duties to UK from china. They seem to be slightly cheaper on ebay, than their electropapa website.
My original battery is in a bad state. If the temperature gets over 28 degrees C then the volts drop rapidly. Infact, I don't think the sensor are giving info very often at all.