NiMH - Nickel Metal Hydride Rechargeable Batteries

NiMH or Nickel Metal Hydride battery technology is more recent than NiCd, and most notably provides higher capacities while reducing environmental impact.

NiMH Advantages

• High capacities for demanding applications, e.g. digital cameras
• Can be used for up to 1000 charge/discharge cycles
• No "memory effect", allowing top-up and part-discharge without adverse effects

NiMH Disdvantages

• Overcharging can cause irreversible damage
• A self-discharge rate of 1%-3% per day means batteries should be charged shortly before use for best performance.