How to Compare Rechargeable Batteries

There are three main types of rechargeable batteries: nickel-cadmium (NiCd), nickel-metal hydride (NiMH) and low self-discharge (LSD). These chargers come with numerous characteristics and features. Buyers must look at voltage, capacity in mAh, capacity for lithium and carbon zinc, recharge cycles, disposal needs, and discharge rates. The challenge is knowing which one is right for your household or business.

Instructions

1. Compare voltage. NiMH & NiCd put out less voltage than alkaline; however, this is only an issue if you need six or more batteries at one time.

2. Compare capacity in mAh (milliampere-hour). This varies by brand. Major brands are ZBattery (Alkaline), Golden Power (NiCd), Pure Energy Brand (AA), and Accucell (D). Radio Shack is also a major NiCd brand.

3. Compare the capacity for lithium and zinc chloride. This information is had to track down, since it isn't usually published. Contact the brand directly to know for certain.

4. Compare recharge cycles. "Recharge cycle" refers to the number of times a battery can be recharged. This can be found in manufacturers' claims.

5. Compare disposal needs. Not all batteries can be disposed of in the same way. Check manufacturing specs to know for sure.

6. Compare self-discharge rate. This measures how fast batteries lose their charge without being used. Some batteries discharge faster at higher temperatures.

References

• Battery Guide
• California Integrated Waste Management Board

Resources

• The Best Rechargeable Batteries and Chargers of 2009