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Whether the larger current capacity would affect the batteries or not is a function of the battery type and whether or not the broom has a built in charger. The typical wall wart charger for a NICAD battery pack depends on the internal resistance of the charger itself to limit current through the cells during charging. Too much current will overheat the cells and reduce their life. NICAD's require a small constant current to maintain a full charge. A couple things to check. First, look at the data plate on the broom and see if it says what the battery voltage is. If it uses a 6 volt battery pack, then there is most likely a charger circuit between the 9 volt input and the batteries, and the larger current capacity won't hurt a thing. Also, if the transformer output is AC and not DC, then there's at least a rectifier circuit between the power input and the batteries, and you're probably also fine. Assuming that you match AC/DC and the connector polarity (if applicable), just plug it in, let the batteries charge for a while, and see if they get warmer than usual. If they don't get warm, then all is well. If they do get warm, you can still use the higher current supply to charge the batteries, just don't leave it plugged in all the time. Easiest way is to put it on a timer so it charges for some short period of time every day. Keith
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