Kent Shafer , Mar 18, 2010; 04:49 p.m.
I had the same problem with an F36 cordless battery pack when I loaded it with rechargeable batteries. I had to remove the six screws on the bottom and take off the bottom plate to get them out. Duracell alkaline batteries work fine, however. I measured the diameters of the alkalines and rechargeables with a dial caliper and found that, while neither type was perfectly round, the rechargeables (mine anyway) were a couple of hundredths of an inch larger on average. The battery pack holds the batteries in tubes of solid metal with no plastic or springs involved, and the tolerances are apparently pretty tight.