No hole or latch, just flat pcb board. I havent tried them yet, I have to dig out my Lynx
Ok found my Lynx, but no batteries. But I plugged in Hot Dog and had no problem getting it in and out. also tried Poker and Relief pitcher, have to be a little more careful with these two since there is a chip across the back of the pcb. but other than that no problem getting them in and out.