These batteries do not need to be discharged every time before recharging. Ni-MH batteries can be damaged from heat by overcharging but this is easily avoided by using a high quality, microprocessor controlled battery charger.
Availability is limited to top end cellular phones and laptop computers.
These batteries offer the highest capacity and the lightest weight. A battery with a higher mAh rating provides longer talk time and standby time for your cellular phone. Higher mAh ratings usually mean a thicker battery. Li-ion batteries are the most efficient batteries available and will pack the same amount of power in an even smaller and lighter battery. High quality battery chargers, designed for easy use and prolonged battery life are also available as well as cellular phone accessories.