steamtrain

I bought me the Renewable energy kit 9688 5 years ago. I tried it a few days ago to play with it this Christmas, but it seams to me that the battery is broke. Maybe this is because i never used it for 5 years, maybe it is a wrong production, i don't know. I found out that it is possible to buy another battery at bricklink,for around 20 euro's. http://alpha.brickli...?S=9669-1#T=S={} But i also found out that there are stronger batteries for around that price. http://www.hamiltonb...v-55amp-g007578 The only problem is that i do not know if the Energy Display (9668-1) is able to charge such a battery. Does any one have a clue if it would be possible?