• Batteries and chargers are less expensive than other types.

• No cadmium (more environmentally friendly than NiCd).

• Very low self discharge.

• Require a special sort of charger.

• Cannot be recharged as many times as other types (25 to 100 times).

• Cannot be fast-charged.

• Reduced capacity under heavy loads (Peukert Effect).

• Can have a reduced capacity after several charge/discharge cycles.