If you had a better chager system you wouldn't be stacking up your tanks quite so much as the battery will charge much quicker with a better charger. HL chargers get way too hot..and i meen way too hot, if you want a risk of a fire in your family home over saving a few £££ for an Ic tank well.... The other point you get with a better charger is..you can discharge the battery then charge it. Doing this a few times will remove the memory point they have,and gives the battery a better life when used. Also with a better charger you can set the Amp level to charge your battery at. Also you can see how well it charged by how many milliamps went in.Also people slag off the standard HL charger, but really for me the only practical way of multiple charging of batteries for multiple tanks
Hope this helps a little as to why you should be thinking about getting a better charging station.