I just had to pass on this nugget of information. I bought a camping light with a sealed lead acid battery in it recently. Here are the charging instructions for the battery as supplied. Usage announcements Refresh ◆Please press battery to ascend to show it refresh the method puts into practice. ◆Please not to refresh to the merge type, the in order to prevent shortens the battery life. ◆Will give or get an electric shock the place in seal completely the container inside or have no row spirit it seal completely the bag inside refreshes. Turn on electricity ◆The battery let°passes the electricity empress must refresh immediately. Operation ◆Please not to wipe or wash the battery outer shell with the organism melting agent. ◆Please not to install the battery in will put hot object or flames flanks. Other ◆Placing the temperature that store room must be in the of-20℃-40℃ ◆The battery storage enters, refreshing every 6 months at least. ◆Make absolutely not to plus or minus knowing the short circuit very. ◆If skin or clothes immodesties be stained with the sulfuric acid, should use the cleaning of water immediately, if the eye spray the sulfuric acid, please cure immediately after washing with the water. All I can say is, beware the 'organism melting agent'.