i could never find half decent 4\5 subc, i tried several different, none lasted long,
today the only half decent subc are made by tenergy, but even with that brand it is hit or miss, they either have several factories, or there are fakes. some of their cells worked great, but others died pretty quick, or maybe some distributors kill them by storing them in wrong conditions.
i had several packs that i build die due to being overheated externally, wonder what happens when you keep a container full, at a port in a hot summer sun for long period of time.
the best results i had was with subc nicd from tenergy, yellow wrapper, 2,4ah iirc. i replaced them in 14,4v milwaukee drill, they worked just as good as oem pack that is made in japan, no loss of torque under any condition. (i eventually killed them, by hooking them to 150w 15v halogen bulb, and forgetting about it for a day, discharged them flat, to 0v, they never recovered.) but it was a while ago, i can’t be sure if it is the case today.