Back story.... Battery cells are confirmed ok and registering 42V per multimeter at outlet Sans Charger appears ok registering 42.1v per multimeter at outlet. see this thread Issue is trying to get battery to charge. I am seeing a green light on the charger when it should be red. I am only able to see the light go red when manipulating the battery (by turning over/ upside down on worktop and giving a gentle tap) : Suggest loose connection somewhere within battery case. Note: battery cells appear to move/ rattle within the battery case which is particularly noticeable when riding over uneven surfaces or when the battery is manipulated. This rattling has been getting worse with continued mileage - currently at 184miles. Oxygen are not aware of this issue with their packs and although out of warranty have kindly offered to look at the battery if I courier it to them but cannot guarantee a repair. I am somewhat concerned with the battery surviving two couriers & repair attempt together with the associated costs for what could be a possible straight forward loose connection issue. Am considering carefully taking the battery pack apart to see if I can see what the issues are and effect my own repair before taking the risk of sending it off. Has anyone here experience with these issues in a battery pack or indeed dismantled the oxygen battery pack and can assist? Pics included to show the packs ports/fuse & visible screws.