You can use a universal charger, but what battery do you have? There are different cell-type batteries, just ensure the generic/universal has the voltage for your battery. What is the model number of your current battery?
I do not mention Amazon as the 'best' or as your only option, it is just what I found in a quick search, you can likely find it elsewhere. Just be sure before you buy it that it is not affected by the recall listed above.