Thanks DaCarr. So just been out to it - Battery level is indicating half way (should I chuck it on charge overnight to check the load test?) So main +ve and -ve from the battery pack shows 46v currently with no services requestd. When I apply slow lift, this drops to on average 36v. If I request more flow/speed I get the fault code and the forklift stops. At this point I get around 33v. Is it worth me going through each battery now? I have similar but not the same size battery packs from a sissor lift that are larger 12v deep soak battery packs but not looked at these in a few years. Many thanks