Kenner's are the same as Hasbro's so Id say yes, people have used them before. Don't go any higher than 4.5 or 6 volts. You'll fry it. You can replace the speaker with the one from store and it will work fine. I used a similar board in my custom saber for years until I finally upraded to an MR board. I also ran a Lux III from the board with no problems. The older toys used two C cells for 3.0volts, and a flashlight bulb. The newer ones used three AA's for 4.5volts and led's to light the blade. It says lamp on the board, right? It proabaly came from a 3 volt toy, so I wouldn't go much higher than 4.5 volts on it. I'd go with the 4.8 rechargeables.