sorry your not having such a good day today Jackie!! i can't help on the battery charging but as for worrying about your grandaughter my mam is exactly the same I ended up buying her this device in smyths that fits under the matress so that she would stop watching to see if the baby was still breathing every 10 seconds. it worked a treat it sound an alarm if there is any problem with baby breathing and allows nanna to have a good nights sleep when she minds her grandaughter!!