The batteries get warm when I charge them. Is this normal?

Yes, when charging NiCD or NiMH rechargeable batteries, they do increase in temperature substantially due to internal resistance. The batteries may feel warm/hot when the charge is completed. According to specification, most NiMH batteries may heat up to 131 deg F or 55 deg C during a rapid charge. Allow your batteries a few minutes to cool down before using them.Tip: Leave the dust cover lid open when you are charging your batteries to help dissipate the heat. ...

Should I buy a "Smart" charger or is a basic slow charger good enough?

They are several things to consider when purchasing a battery charger:The  main disadvantages with basic chargers are:  >They tend to either undercharge or overcharge your batteries. Basic chargers apply a set charge rate and then shut off with a timer. High capacity batteries may not have received a full charge before the timer shuts off the charge especially if you are using an older charger. Batteries that are only partially discharged will receive the same timed charge and your batteries ...

Please visit our FAQs session for more information ...