My sister received her EBC bike and wants to keep the battery inside her house (she is in Seattle). She has repeatedly attempted to remove the battery from the rear rack case but it will not slide out. Yes, she turns the key as demonstrated in the videos and pulls from the bottom rear of the battery. Yes, the power does come ON, so the battery is obviously seated properly in the case initially. Is anyone having this problem or have any idea what may be the cause? Thanks.